6+,9$-, 81,9(56,7< .2/+$385 - unishivaji.ac.in · )25 &2//(*( 6+,9$-, 81,9(56,7< .2/+$385...

$: 6+,9$-, 81,9(56,7< .2/+$385 - unishivaji.ac.in · )25 &2//(*( 6+,9$-, 81,9(56,7< .2/+$385 3udfwlfdo ([dplqdwlrq lq 3k\vlfv dw % 6f 3duw ,,, )heuxdu\ 0dufk ,qvwuxfwlrqv wr &dqglgdwhv$
FOR EXAMINER SHIVAJI UNIVERSITY, KOLHAPUR

Practical Examination in Physics at B. Sc. Part III February / March 2016 Instructions to the Examiners

1. Examiners must ask oral questions pertaining to the experiment only. They should try to know the understanding of the students about the experiment.

2. As far as possible examiners should avoid a change of experiment once allotted. They should help student and deduct proportionate marks. Sd/- Prof. B. P. Relekar, Chairman, B. Sc. Part III Physics Practical Examination 2016

FOR COLLEGE SHIVAJI UNIVERSITY, KOLHAPUR

Practical Examination in Physics at B. Sc. Part III February / March 2016 Instructions to the Laboratory Supervisors

1. It is expected that all experiments as per slips be arranged in the laboratory at the time of inspection on the day as declared.

2. A copy of question slips sent herewith would be used by Lab Supervisor for arranging experiments of each group. The slips are also to be displayed for information of students.

3. The date wise distribution of Groups of experiments to candidates should be displayed. 4. The candidates should be supplied with necessary mathematical tables. Use of non programmable

calculator is allowed. 5. Experts should keep a file of the actual circuit diagrams, observations and calculations recorded

by them. If required it should be given to the examiner for reference. Data of various constants must be given whenever required.

6. All slips are to be completely pasted on the answer paper. Sd/- Prof. B. P. Relekar, Chairman, B. Sc. Part III Physics Practical Examination 2016

FOR COLLEGE SHIVAJI UNIVERSITY, KOLHAPUR

Practical Examination in Physics at B. Sc. Part III February / March 2016 Instructions to Candidates

1. The time of examination is given below. The candidate must be present at least 15 min beforethe scheduled time at fixed place.

2. The candidate must produce his/her duly certified laboratory journal and should bear examination seat number at right hand top corner. However if a candidate has lost journal he/she must produce a certificate regarding the completion of required number of experiments.

3. The students will be examined in six practical each of 3 hours duration. 4. The Candidates should note carefully the distribution of marks shown on each practical slip. 5. All observations and calculations must be written in blue ink only. 6. Use of logarithmic table /calculator is allowed. Candidate should bring their own sets of

geometrical instruments. 7. Candidates must show at least one adjustment of each type to the examiner and get it signed. 8. The candidates should also read carefully the instructions printed on the answer-book. 9. The candidates will not manipulate any observation, calculations/results.

Time: Morning : 11-00 a.m. to 2-00 p.m. and Evening : 2-30 p.m. to 5-30 p.m. Sd/- Prof. B. P. Relekar, Chairman, B. Sc. Part III Physics Practical Examination 2016

SHIVSJI UNIVERSITY, KOLHAPUR

B.Sc. III, Practical Examination, February / March 2016

PHYSICS

Seat No. GROUP I

1. Resonance Pendulum

i) Plot a graph of maximum amplitude ‘A’ against the length of simple

pendulum ‘l’. Obtain the resonating length ‘L’.

ii) By keeping the length of simple pendulum equal to the resonating

length L, vary the mass ‘M’ of the simple pendulum and measure

amplitudes for different masses.

Plot a graph of 1/A2 vs 1/M

2. Hence determine the damping coefficient ‘r’.

r² =(n2 − p2)²

p² x

Slope

Intercept on 1/A²axis

where n² =g

L, p =

T

2π and T = period of Kater’s pendulum

Scheme of Marking :

Sr.

No.

Head of distribution of marks Marks

Alloted

Marks

Obtained

Remarks

if any

1

2

3

4

Correct procedure and adjustments

Observations

Calculations (4), graphs (5), result (2)

Oral

6

10

11

3

Total 30

Signature of Examiner



PHYSICS

Seat No. GROUP I

2. Surface Tension of soap solution

Determine the surface tension (T) of the given soap solution by forming a film

of it.

Use the formula

T =𝑚𝑔

2(𝑎 + 𝑏 +𝑕2

𝑎 − 𝑏)

where

m = Mass attached to the film (Mass of frame + mass attached)

2a = Width of film at the frame

2b = Minimum width of the film at the centre

2h = Vertical length of the film

Scheme of Marking :

Sr.

No.


Alloted

Marks

Obtained

Remarks

if any

1

2

3

4

Correct procedure and adjustments

Observations

Calculations (6) and result (3)

Oral

8

10

9

3

Total 30

Signature of

Examiner



PHYSICS

Seat No. GROUP I

3.Surface Tension by Fergusson’s modified method

Determine the surface tension (T) of mercury by using Fergusson’s modified

method.

Use the formula

T =𝑟 𝑕 𝜌 𝑔

2 𝑐𝑜𝑠𝜃

where 𝜃= Angle of contact of mercury = 134°

𝜌 = Density of manometer liquid

g = 980 cm / sec2

Scheme of Marking :

Sr.

No.


Alloted

Marks

Obtained

Remarks

if any

1

2

3

4

Correct adjustments

a)Circuit diagram and connections with proper

setting of platinum wire in the capillary (5)

b)Mercury surface in the beaker at the level of

platinum wire tip with microscope (5)

Observations

a)Radius of capillary (4)

b)Difference in the manometric liquid levels when

the electric bulb just glow (6)

Calculations (4), result, unit (3)

Oral

10

10

7

3

Total 30


SHIVAJI UNIVERSITY, KOLHAPUR


PHYSICS

Seat No. GROUP I

4.Flat Spiral Spring (Y / η)

Determine the Young’s modulus Y OR Modulus of rigidity η by plotting the

respective graphs 1. I against T12

OR 2. M against T22. Use the formula

Y =32𝜋²𝑁𝑅(𝐼+𝐼0)

𝑟4T12 OR η =

16𝜋²𝑁𝑅3(𝑀+𝑚3

)

𝑟4T22

Where N = Total number of turns in the spring, I0 = M. I. of fixed part of the

vibrating system

I = M.I. of two discs = 2m` a2; 2m` = Mass of two discs; a = distance of each disc

from centre

R = Radius of cylinder of spring, r = radius of wire of spring, T1 = Period of torsional

oscillations, T2 = Period of vertical oscillations, m = mass of the spring, M = mass

attached to the spring

Read the negative intercept on I axis in graph 1 and intercept interpret it.OR

Determine ‘m’ from graph 2

Scheme of Marking :

Sr.

No.


Alloted

Marks

Obtained

Remarks

if any

1

2

3

4

Correct adjustments and procedure

Observations

Calculations (4), graph (3), result, unit (3)

Oral

7

10

10

3

Total 30

Signature of

Examiner



PHYSICS

Seat No. GROUP I

5.Young’s Modulus (Koenig’s Method)

Attach the two plane mirrors beyond the knife edges of beam with breadth ‘b’

and depth ‘d’. Let ‘a’ be the distance between mirrors and ‘L’ the distance between

knife edges.

Place the scale behind one of the mirrors and telescope behind the other, so that

you can view the scale through the telescope after reflection at both mirrors. Let ‘D’

be the distance between scale and mirror opposite to it and ‘x’ the depression due to

each load W = Mg, at the centre. Apply at least five loads.

Plot a graph of M against x. Determine Young’s modulus by using the formula

Y =3

2 𝑔𝑙2(2𝐷+𝑎)

𝑏 𝑑3 𝑀

𝑥 =

3

2 𝑔𝑙2 2𝐷+𝑎

𝑏 𝑑3(𝑆𝑙𝑜𝑝𝑒 𝑜𝑓 𝑔𝑟𝑎𝑝𝑕)

Scheme of Marking :

Sr.

No.


Alloted

Marks

Obtained

Remarks

if any

1

2

3

4

Correct setting (5) and procedure (4)

Observations

a) Preliminary Observations (3)

b) Readings for depression (5)

Graph (4), Calculations (4), result, unit (2)

Oral

9

8

10

3

Total 30

Signature of

Examiner



PHYSICS

Seat No. GROUP I

6. Y- by Cornu’s Method

Determine Young’s modulus of the glass using Cornu’s method, by measuring

minimum distance Dn between nth

pair of fringes.

Plot a graph of D2 against n and calculate R, radius of curvature of glass

plate.

Y = 6𝑔𝐿 𝑀 𝑅

𝑏 𝑑3 ; R=

𝐷𝑛+𝑠 2 − 𝐷𝑛

2

4𝜆𝑠=

𝑠𝑙𝑜𝑝𝑒 𝑜𝑓 𝑔𝑟𝑎𝑝 𝑕

4𝜆

Where L = Distance between knife edge and corresponding load on each side.

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

Correct procedure and obtaining fringes

Observations


Oral

12

7

8

3

Total 30




PHYSICS

Seat No. GROUP I

7. Stefen’s Fourth Power Law

Verify Stefen’s fourth power law by using given apparatus.

N. B. :- Do not pass the current unless the connections are checked by the examiner.

Scheme of Marking :

Sr.

No.


Alloted

Marks

Obtained

Remarks

if any

1

2

3

4

Circuit diagram

Connections

Observations

Graph (6), Calculations (4), result(2)

Oral

4

3

8

12

3

Total 30




PHYSICS

Seat No. GROUP I

8. Thermal Conductivity by Lee’s method

Determine the thermal conductivity of the given material in the form of disc by

Lee’s method. Use the formula

K =d

A(θ1−θ2)

(r+2h)

2(r+h) M. S

dθ

dt at θ2

Where A = πR2 Area of specimen disc, R = Radius of specimen disc, Θ1 = Temp.

of upper surface of specimen disc at steady state, Θ2 = Temp.of lower surface of

specimen disc at steady state, d = Thickness of the specimen disc = cm, M

= Mass of metal disc = gm S = Sp. Heat of lower metal disc =

cal / gm / 0C, r = Radius of metal disc;

h = height of metal disc

Scheme of Marking :

Sr.

No.


Alloted

Marks

Obtained

Remarks

if any

1

2

3

4

Procedure

Observations


Oral

8

8

10

4

Total 30




PHYSICS

Seat No. GROUP I

9. Velocity of sound using CRO

Determine the wavelength of sound waves in air at room temperature, for three

different audio frequencies produced by A.F. Generator. Hence determine the

velocity of sound in air –

i) At room temperature Va and ii) At zero degree Celsius. Use the formulae –

Va = n 𝜆a and V0 = 𝑉𝑎

(1+𝛼𝑡2

)

Where n = Frequency of audio signal wave

Va = velocity of sound in air at room temperature

α = 0.00367 / 0C

t = room temperature = 0C

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

Procedure and adjustments

Tabular form with required number of observations


Oral

8

10

8

4

Total 30




PHYSICS

Seat No. GROUP I

10. Temperature of Flame (Absorption Spectrum)

1. Determine the resistance of filament at room temperature by using P. O.

Box.

2. Estimate the temperature (t) of the given flame by the method of reversal

of spectral lines. Use the formula Rt =R0 (1+ α t) where α = 0.0052 / 0C

for tungsten

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

Procedure and adjustment

i.Circuit diagrams (3) ii. Alignment of high wattage

lamp, lens system sodium flame (4) iii. Adjustment

of spectrometer to obtain band spectrum (4)

Observations

i. Resistance of the filament of lamp by P.O.Box (4)

ii. Reversal of spectrum and reading for voltage and

current (4)


Oral

11

8

7

4

Total 30




PHYSICS

Seat No. GROUP II

1 Cardinal Points by Turn Table

1. Determine focal lengths of two thin lenses by auto collimation method.

2. Using the turn table find the positions of focal points and nodal points of

the given system of two lenses separated by finite distance.

Draw the diagram to represent the cardinal points.

Find the focal length of the system from the diagram and verify it by the

formula –

1

𝐹=

1

𝑓1+

1

𝑓2−

𝑑

𝑓1𝑓2

3. Repeat the experiment for ONE more distance.

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

Ray diagram showing cardinal points

Observations

i. Focal length by auto collimation (4)

ii. Adjustments (4)

iii. Readings for second set (4)

Calculations (5), result (2)

Oral

7

12

7

4

Total 30




PHYSICS

Seat No. GROUP II

2. Cardinal Points by Newton’s method

Determine focal points and principal points of a thick lens by Newton’s

method.

Take at least three different readings.

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

5

Ray diagram for image formation using cardinal

points and auto collimation

Correct adjustments and procedure

Observations

i. Auto collimation method (4)

ii. Removal of parallax (6)

Calculations (3), Diagramatic representation of

cardinal points (5)

Oral

4

5

10

8

3

Total 30




PHYSICS

Seat No. GROUP II

3. Thickness of thin film

Place the given thin film on a plane glass plate and then form a wedge

shaped air film by placing another plane glass plate on it. Incident monochromatic

light normally and obtain the interference fringes. Measure the length of air wedge

and fringe width. Hence determine the thickness of thin film. Use the formula –

𝑡 =𝐿

𝑥

𝜆

2

Where t = Thickness of thin film, L = Length of wedge shaped air film

x = Fringe width, λ = Wavelength of monochromatic light =

cm

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

5

Ray diagram

Correct adjustments, focussing and procedure

Observations


Oral

3

6

10

8

3

Total 30




PHYSICS

Seat No. GROUP II

4. Diffraction due to a single slit using Sodium / Laser source

Determine wavelength of the given monochromatic light by investigating

the diffraction pattern (Fraunhofer) of single slit. Plot a graph of sinθ against m. Use

the formula –

e sinθ = mλ for dark fringes.

Where e = slit width, Θ = angle of diffraction,

m = 1,2,3 …. etc. for the first, second etc. points of minimum intensity on

either side of

principal maximum

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

5

Ray diagram

Correct adjustments for good fringes

Observations

i. Readings for dark fringes (7)

ii.Slit width (3)


Oral

3

6

10

8

3

Total 30




PHYSICS

Seat No. GROUP II

5. Diffraction due to cylindrical obstacle

Make necessary adjustments to obtain the fringes in the geometrical shadow

of the given cylindrical obstacle. Take the micrometer readings corresponding to

different fringes.

Plot a graph of micrometer readings against the corresponding order of

fringe.

Measure the width of the wire of obstacle by micrometer screw gauge.

Hence measure the wavelength of the monochromatic light using the formula

–

λ = 𝑥𝑑

𝐷

Where x = Distance between consecutive bright or dark fringes, d = Width of wire,

D = Distance between the wire and the focal plane of the eye-piece,

corrected for the bench error.

Given bench error = cm

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

5

Ray diagram

Correct pattern without shift

Observations

i. Fringe width (6)

ii.Width of wire (3)


Oral

4

6

9

8

3

Total 30




PHYSICS

Seat No. GROUP II

6. Diffraction at straight edge

Determine wavelength of the given monochromatic light by

investigating the diffraction pattern by a straight edge. Plot a graph of Xn against 𝑛

and find K(slope). Hence calculate λ. Use the formula

λ = 𝑞

2𝑝(𝑝+𝑞)K²; K=

𝑋𝑛−𝑋𝑚

𝑛− 𝑚

Where Xn = Reading of nth

minima, Xm = reading of mth

minima

n = order of nth

minima, m = order of mth

minima

λ = Wavelength of light used, p = Distance between straight and eyepiece,

q = Distance between straight and slit

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

5

Ray diagram

Correct pattern

Observations


Oral

4

6

9

8

3

Total 30




PHYSICS

Seat No. GROUP II

7. Lloyd’s single mirror

Set up the optical bench and make the necessary adjustments until

interference fringes are formed by the light from a slit illuminated by a sodium lamp.

Determine the wavelength of the light by using formula

λ = 𝑥𝑑

𝐷

Where X = Separation between consecutive fringes, D = Distance between slit and

eyepiece

d = Distance between two coherent sources = 𝑑1𝑑2

d1 = Distance between the reduced images of the sources

d2 = Distance between the magnified images of the sources

Given bench error = cm

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

5

Ray diagram

Correct pattern

Observations


Oral

4

6

9

8

3

Total 30




PHYSICS

Seat No. GROUP II

8. Diameter of Lycopodium powder

Plot a graph of ‘r’ against ‘D’ for the first and second order. Hence

calculate the diameter ‘d’ of lycopodium powder particles by using respective

formula –

𝑑 =1.22 𝜆 𝐷

𝑟 …… for first order and 𝑑 =

2.27 𝜆 𝐷

𝑟 …… for

second order

Where r = radius of the ring, D = distance between the screen and the hole

λ = Wavelength of light used = cm

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

Correct diffracted rings

i. For first order (5)

ii. f For second order (5)

Observations


Oral

10

8

9

3

Total 30




PHYSICS

Seat No. GROUP II

9. Spherical Aberration

Plot Caustic curve for given thick planoconvex lens. Hence determine the

ratio of transverse (Lateral) OR

Determine the refractive index of given liquid by the method of total

internal reflection.

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

Adjustments and procedure

Observations


Oral

10

6

10

4

Total 30




PHYSICS

Seat No. GROUP II

10. Absorption spectrum of liquid (KMnO4 solution)

Adjust the spectrometer for parallel light by Schuster’e method.

Calibrate the prism spectrometer using Hg source.

Obtain the band absorption spectrum of KMnO4 solution using a continuous

source (tungsten filament source). From calibration curve, determine

wavelengths corresponding to band heads.

Colour Red Yellow Green Blue Violet I Violet II

Wavelength A0 6908 5791 5461 4358 4078 4047

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

4

5

6

Adjustments and procedure

Observations

Calibration Curve

Absorption Spectra Observations

Results

Oral

7

5

3

8

4

3

Total 30



B. Sc. Part-III, Practical Examination, February, March 2016

Physics Seat No. GROUP III

1. Owen’s bridge

Obtain d. c. balance; find the value of resistance of inductance coil and maintaining the conditions of d. c. balance, determine the self-inductance of a coil in terms of standard resistance and capacitance by Owen’s bridge, using a. c. balance by the given formula

L = ..................

N. B. :- Do not pass the current before getting the connections checked.

Sr.

Heads of distribution of marks

Marks Marks Remarks

No. Allotte

d obtained if any

1. Circuit diagram 7

(a) for d. c. balance (3) (b) for a. c. balance (4)

2. Connections 6

3. Observations 10

(a) d. c. balance (4) (b) a. c. balance (6)

4. Calculations (2), result (1) and unit (1) 4

5. Oral 3

Total : 30

Signature of examiner.




2. Maxwell’s Bridge (Self inductance)

Draw circuit diagram for Maxwell’s inductance - capacitance bridge and make

the connections. Make the bridge sensitive by selecting proper values of the

components. Obtain AC balance and hence calculate the value of the self inductance.

Repeat the experiment thrice by changing the circuit conditions. Scheme of Marking :

Sr.


Marks Marks Remerks

No. Allotte

d obtained if any


2. Circuit connections 7

3. Observations 8

4. Calculations (3), result (2) 5

5. Oral 3

Total : 30





3. Measurement of Self Inductance (Rayleigh’s Method)

Determine the value of the self inductance of the given coil.

4/1

3

11

2

rTL

where L = Self inductance of the coil

T=Period of the ballistic galvanometer

θ1=First ballistic throw

θ3=Second throw on the same side

ϕ= Steady deflection corresponding to a known resistance

Use Rayleigh key for this purpose. Take five different values for r and observe the steady deflections for them. Plot r against φ and determine the slope. Hence find L from the above formula.

N. B. :- 1. Get your diagram checked.

2. Get your connections checked before passing the current.

Sr.


Marks Marks Remerks

No. Allotte

d obtained if any


2. Connections 5

3. Observations 8

(a) Bridge balance (2) (b) Inductive throws (2)

(c) Steady deflections (4)

4. Calculations (4), graph (2), Result (2) 8

5. Oral 3

Total : 30



B. Sc. Part-III, Practical Examination, February, March 2016 Physics Seat No. GROUP III

4. Earth Inductor

Determine BH, BV and θ by using an earth inductor and standard

solenoid.

HH

i

nD

dnnB

2

2

21

10

4

VV

i

nD

nnB

2

21

10

4

;

H

V

B

B1tan

n1 = No. of turns / cm. of primary of solenoid n2 = No. of turns of secondary of solenoid d = Diameter of secondary of

solenoid D = Diameter of earth

inductor

n = Total number of turns of earth inductor θH = First throw when earth indnctor responds to horizontal field component θV = First throw when earth indnctor responds to vertical field component. θ = throw shown by B. G. for corresponding current ‘i’

N. B. :- Get your connections checked before passing the current. Sr.


Marks Marks Remerks

No. Allotted obtained if any


2. Connections 4

3. Setting of Earthcoil for i) BH ii) BV 4

4.

Observations for i) BH (2) ii) BV (2) iii)

Calibration (2) 6

5. Calculations (2), graph (2) results (2) and units (1) 7

6. Oral 3

Total : 30





5. Hysteresis (Magnetometer Method)

i) Arrange the magnetising and compensating coils (of a turns/cm) in the east-west direction. Set the magnetometer in the magnetic meridian, between the coils so that pointer reads 0-0 of the scale, after levelling it.

ii) Make the connections and perform a trial experiment to adjust the distance of the

magnetising coil keeping the specimen bar inside it.

iii) Remove the specimen bar (magnetic length 21 and area of cross-section S) from the

magnetising coil and adjust the distance of the compensating coil so as to neutralise the

effect of magnetising field upon the magnetometer (at maximum current 3 amps.) iv) Demagnetise the given specimen by any standard method.

v) Introduce the specimen bar in the magnetising coil and let ‘d’ be the distance of

magnetometer needle from the centre of the bar. Take the specimen round a complete

and uninterruped

cycle of magnetisation starting from zero current to maximum value 3 amperes. Note the diflection of the magnetometer needle φ for various currents i.

vi) Plot the graph between tan φ (y-axis) and i (x-axis). Hence determine retentivity and coercivity using the respective formulae,

tan4

)( 222

Lsd

IdHI

10

4 niF

Where i is in Ampers

H= 0.36 Oersted

2L = Geometric length of the specimen bar.

N. B. :- Get your connections checked before passing the current.

Sr. No.

Heads of distribution of marks Marks Allotte

d Marks

obtained Remerks if any

1. Circuit Diagram 6

2. Connections (3) and proper setting (3) and compensation (2) 8

3. Observations 6

4. Graph (4), Calculations (3) 7

5. Oral 3

Total : 30





6. Method of Leakage

Determine two high resistances by the method

of leakage. * Using formula

)(..303.2 010

LogC

tR

where

φ0 = first throw

when

t = 0

φ = throw corresponding to leakage time t

C = Capacitance of condenser = (given) =.................

Plot the graph between t and log10(ϕ 0/ϕ)

N. B.:- Get your connections checked before passing the current.

Sr.


Marks Marks Remerks

No. Allotte

d obtained if any


2. Connections 5

3. Observations 8

a) For one high resistor (4)

b) For the other high resistor (4)

4. Calculations (3), Graph (5) 8

5. Oral 3

Total : 30





7. Resistance of B. G. by half deflection method.

You are given a circuit diagram. Make the connections accordingly and hence measure the resistance of B. G. by half deflection method.

Get the connections checked before passing the current. Scheme of Marking :

Sr.


Marks Marks Remarks



2. Connections 5

3. Observations 8

4. Calculations & Results 6

5. Oral 3

Total : 30





8. Carey-Foster’s Bridge

Calibrate the given bridge wire by Carey-Foster Method. Cover the entire length of the wire in succession by taking the segment of wire about 5 to 10 cms. Carey-Foster key must be used for reversing the gap. N. B. :- Get your connections checked before passing the current.

Sr.


Marks Marks Remarks



2. Connections 7

3. Observations 7

4. Calculations and graph 8

5. Oral 3

Total : 30





9. e/m by Thomson’s Method 2016 1. Place the C. R. tube in the magnetic meridian. Connect the tube to the power

supply and obtain a sharp luminous spot on the screen. 2. Place two identical magnets symmetrically in the east-west direction with their

opposite poles facing each other on two sides of the tube and note the deflection ‘y’ of the spot, from original position.

3. Apply an electric field of certain strength such that spot is again brought back to

the original position. Measure the balancing voltage ‘V’ volts. 4. Remove the C. R. tube and place a magnetometer needle for finding the strength

of the magnetic field along the tube due to bar magnet (at the same distance as in. 2) Note the deflections ‘θ’ of the needle at various distances (x) by displacing the magnetic needle along magnetic meridian. Calculate H from the formula H = H’ tan θ (H’ = 0.37 oersted and hence obtain H, average field. Calculate h = H

_ H for various values of x.

5. Plot a graph h (l-x) Vs x and determine the area under the curve within limits zero to ‘l’, which is equal to the value of the integral in formula.

8

2

0

2

10

)(2

1

2

l

dxxlhlHD

pyVLp

m

e

Given, a) Length of deflecting plate P=……… b) Distance between the plates D=……….. c) Distance of the edge of the deflecting plates from screen L=……… d) Length of electron path under magnetic field l=………….

Signature of

examiner.

Sr. Heads of distribution of marks

Marks Marks Remarks


1. Correct Procedure 9 2. Observations 8 3. Graphs (4) and

Calculations (6) 10

4. Oral 3

Total : 30




10. Absolute Capacity of a Condenser using B. G.

Connect the resistance (R1) across the condenser C, charge the condenser and then discharge through B. G. which is parallel to condenser; and record 1st and 2nd throws on the same side as θ1 and θ3. Keeping (R1) constant, measure the steady deflection δ for a constant current through B. G., when B. G. is shunted with a small shunt resistance (r). Repeat the experiment for four different values of shunt resistance (r) and note the corresponding deflections (δ).

Plot (r) against (δ) and determine the slope.

Hence calculate the capacitance using the formula - Given

4

1

2

11

1

..1

.2

r

GR

TC

ii) where,

T = Periodic time of B. G. =....................Sec

G = Resistance of B. G. = ..................... ohms

Sr.

Heads of distribution of marks Marks Marks Remarks

No.

Allotted obtained if any


2. Connections 6

3. Observations 8

4. Calculations (3), graph (2) and result (2) 7

5. Oral 3

Total : 30


31


B. Sc. Part-III Practical Examination February/March 2016

Physics

Seat No. GROUP IV

1. Voltage Sweep Generator using UJT Draw the circuit diagram of voltage sweep generator sing UJT 2N2646.

Assemble the circuit. Observe the waveforms on CRO. Measure the frequency of the

waveforms for three different charging resistances R. Verify these frequencies by

using the formula

Frequency ( f ) =

)1

1(log303.2

1

10n

RC

Where ‘R’ is charging resistance

N.B. 1) Get your circuit diagram checked.

Get your connections checked before connecting the source of e.m.f. Scheme of Marking:

Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 8

2 Connections 5

3 Observations 8

4 Calculations & tracing of waveform 6

5 Oral 3

Total 30


32


B. Sc. Part-III Practical Examination February/March 2016

Physics

Seat No.

GROUP IV

2. Astable Multivibrator Using IC 555

Draw the circuit diagram of astable multivibrator using IC555.Assemble the circuit.

Observe the waveforms on CRO. Measure the frequency of the waveforms for three

different charging resistances. Verify these frequencies by using the formula

Frequency ( f ) =CRR BA ).2(

44.1

Where C – charging capacitor, RA – charging resistor and RB – discharging resistors


2) Get your connections checked before connecting the source of e.m.f. Scheme of Marking: Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 8

2 Connections 5

3 Observations 8

4 Calculations & tracing of waveform 6

5 Oral 3

Total 30

Signature of examiner

33


B. Sc. Part-III Practical Examination February/ March 2016

Physics

Seat No.

GROUP IV

3. Monostable Multivibrator Using IC 555

Draw the circuit diagram of monostable multivibrator using IC-555. Assemble the circuit. Measure the Pulse width for three different values of R.. Verify the results by using relation.

T = 1.1 RC



allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 8

2 Connections 5

3 Observations 8

4 Calculations 6

5 Oral 3

Total 30


34



Physics Seat No. GROUP IV

4. OP - AMP as Inverting Amplifier

Draw the circuit diagram of OP-AMP as inverting amplifier. Use IC 741. Assemble

the circuit. Take at least five readings. Calculate the gain of amplifier using mean

value and from the graph of output voltage versus input voltage. Verify both the

results.


2) Get your connections checked before connecting the source of e.m.f. Scheme of Marking:


allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 8

2 Connections 5

3 Observations 8

4 Graph & Calculations 6

5 Oral 3

Total 30


35




5. OP-AMP AS a Schmitt Trigger

Draw the circuit diagram of Schmitt trigger using a given IC741. Assemble the

circuit. Measure the output Voltage for different input voltages. Use C.R.O. / digital

multimeter for measuring output voltages. Plot the hysteresis curve. Hence determine

UTP & LTP. Verify values of UTP & LTP using the necessary formulae.

OR

5. Study of Variable D. C. supply using IC-LM 317

Draw the Circuit diagram of Variable D. C. Supply using IC LM 317 Assemble the

circuit & study its operation. Plot the graph of output voltage versus load current and

find the voltage regulation factor.



allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 8

2 Connections 5

3 Observations 8

4 Graph & Calculations 6

5 Oral 3

Total 30


36




6. Solar Cell

Plot the photovoltaic output I-V. Characteristics of the given solar cell, and

hence determine the fill factor and power conversion efficiency of solar cell

using the formulae

1) IscVoc

VmfactorFill

.

Im.

2) 100Im.

conversionPower % XP

Vmefficiency

i

Where Pi is the input power that incident on solar cell, Vm and Im - voltage and

current respectively at knee point on the graph.


2) Get your connections checked by the examiner. Scheme of Marking:


allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 5

2 Connections 5

3 Observations 8

4 Graph , Calculations & Result 9

5 Oral 3

Total 30


37




7. Crystal Oscillator Build a Crystal Oscillator using the given components. Obtain the output waveform of the Oscillator on CRO and find its Frequency.


2) Get your connections checked by the examiner. Scheme of marking Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 8

2 Connections 5

3 Observations 8

4 Observations, calculation and tracing of waveform

6

5 Oral 3

Total 30


38




8. Determination of Planck’s constant

Use different colored Light Emitting Diodes (LED) with known wavelength (l) and

find their just turn on voltages (Vo

Planks constant using the formula. .

oeVch

.

Where h- Planks constant, c- -wavelength of emitted light

Vo- just turn on voltage


2) Get your connections checked by the examiner. Scheme of marking Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 8

2 Connections 5

3 Observations 8

4 Graph and calculation 6

5 Oral 3

Total 30


39

SHIVAJI UNIVERSITY, KOLHAPUR B. Sc. Part-III Practical Examination February/ March 2016

Physics

Seat No. GROUP IV

9. Negative feedback amplifier Draw the circuit diagram for negative feedback amplifier. Assemble the circuit. Take

at least five readings with the feedback capacitor in the circuit and without feedback

capacitor. Calculate the gain of amplifier in both the cases and comment on your

result. .


2) Get your connections checked before connecting the source of e.m.f. Scheme of Marking:


allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 8

2 Connections 5

3 Observations 8

4 Calculations and result 6

5 Oral 3

Total 30


40




10. Band gap energy using semiconductor diode

Measure the reverse current (IS) at different temperatures (T0K) for given Semiconductor diode. Plot

the graph of log IS against T

1 and measure the slope. Hence calculate the band gap Eg in eV of

semiconductor using the formula,

OR

10. Temperature sensor using semiconductor diode

Measure the voltage (VD) across semiconductor diode at various temperatures

T between room temperature to 50 oC in step of 5

oC. Plot the graph of VD

versus T and find the slope of the graph. Interpret the result. Scheme of Marking: Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Circuit diagram 5

2 Circuit connection 5

3 Observations 10

4 Graph, Calculation and results 7

4 Oral 3

Total

Signature of examine

5036

slopeEg

41



Physics Seat No. GROUP V (A)

A-1. Study of divergence of Laser beam

Measure the full angle beam divergence of a given laser beam. Compare the same with the theoretical value of angular spread Δθ of the far field beam, given by

d

Where λ= wavelength of laser beam=……………….. d= Aperture diameter=……………

Scheme of Marking :


Marks Marks Remarks


1. Observations 6

2. Calculations (3) and result (2) 5

3. Oral to test experimental skill 4

Total : 15


42




A-2. Polar graph using Photocell/Photovoltaic cell

With the given experimental set up, measure the intensity of the filament-lamp for various angular positions and plot the polar graph to show intensity distribution by keeping filament lamp in horizontal position. Scheme of Marking :


Marks Marks Remarks


1. Observations 6

2. Polar graph 5


Total : 15


43




A-3. Measurement of wave length of Laser beam using plane diffraction grating.

Using the diffraction grating & given laser source, obtain diffraction pattern. Determine the wavelength of laser source with the formula,

21

22 )(

sin

DX

X

m

d

m

d

m

m

m

where,

d = grating element = ........................ cm.

m = order of diffraction.

xm = distance of m

th order from central maximum. D =

distance between screen and grating. Scheme of Marking :


Marks Marks Remarks


1. Observations 5

2. Calculations (4) and result (2) 6


Total : 15


44




A-4. Optical leveling and Schuster’s method of a spectrometer.

i) Carryout the optical leveling of given spectrometer

ii) Adjust the spectrometer for parallel light by Schuster’s

method. Show each adjustment to the examiner Scheme of Marking :


Marks Marks Remarks


1. Optical leveling 5

2. Schuster’s method 6


Total : 15


45



Physics

Seat No. GROUP V (A)

A-5. Obtaining Biprism fringes without lateral shift

i) Obtain clear fringe-pattern using given biprim.

ii) Remove the lateral shift (optical alignment) Show

the adjustments to the examiner

Scheme of Marking :


Marks Marks Remarks


1. Clear fringe pattern 5

2. Optical alignment 6


Total : 15


46




A-6. Measurement of distance between two coherent sources in biprism experiment

You are provided with clear fringe pattern without lateral shift.

Measure the distance between two coherent sources d = √d1 d2

where, d1 = distance between magnified images d2 =

distance between rednced images. Scheme of Marking :


Marks Marks Remarks


1. Adjustments 4

2. Observations 5

3. Calculation (1) and result (1) 2


Total : 15


47




A-7. Comparison of capacities by measuring throws separately. Make the connections according to the given circuit diagram and hence compare the capacities

(C1/C2) of the two given capacitors by measuring the throws (θ1 & θ2) separately

2

1

2

1

C

C


Scheme of Marking :


Marks Marks Remarks


1. Connections 4

2. Observations 5

3. Calculation (1) & result (1) 2


Total : 15

48



Physics

Seat No. GROUP V (A)

A-8. Testing of electronic components

Test the given four components (a resistor, a capacitor, a diode and a transistor) by using multimeter/ CRO and note the results. Scheme of Marking :


Marks Marks Remarks


1. Testing 8

2. Results 4


Total : 15


49




A-9. Hysteresis by using CRO

You are given circuit diagram. Make the connections accordingly and obtain hysteresis loop on CRO. Measure the intercept OA and OB on x - and y - axis respectively for standard anchor ring. Repeat the experiment with a given experimental anchor ring and measure the respective intercepts

OA1 and OB1. Calculate the coersitivity (C1) and retentivity (R1) as : (i) C = OA (ii) R = OB

C1 OA1 R OB 1 1

Given : C = ............................ , R = .................................

Note : Get the connections checked before switching on the circuit.


Marks Marks Remarks


1. Circuit connections 4

2. Hysteresis loop (3),

Measurement of intercepts (2) 5



Total : 15


50




A-10. Study of Lissajeous figures using CRO

Determine the frequency of A.C. mains using a step-down transformer connected to y-plates. Use an audio frequency generator, as a source of known frequency connected to x-plates and obtain three different Lissajeous figures.

Show the Lissageous figure to the examiner.

V

H

x

y

N

N

f

f

Calculate frequency of A. C. main (fy), using the formula

where Nh = No. of loops tangentially touching to x-axis

Nv = No. of loops tangentially touching to y-axis


Marks Marks Remarks


1. Connections 4

2. Lissajeous figures

Measurement of Nh & NV 4



Total : 15


51



Physics Seat No. GROUP V (B)

B- 1. Kelvin’s Method Measure the resistance of the given galvanometer using P.O. Box by Kelvin’s

method. Scheme of Marking: Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Circuit connection as per given circuit 4

2 Balance point 5

3 Calculation (2) & result (1) 3

4 Oral to test experimental skill 3

Total 15


52




B- 2. Time base Circuit You are given a circuit diagram. Make the connections accordingly and hence measure the time period for corresponding charging resistance. Determine the frequency. Scheme of Marking:


allotted

Marks

obtained

Remarks

if any

1 Connections 5

2 Procedure Observations calculations 5

3 Result 2


Total 15


.

53




B-3. Determining the radius of capillary bore using mercury thread Introduce a thread of mercury of length more than 2cm. in the given capillary tube and measure its length (l) by meter-scale. Measure the mass (m) of the mercury thread. Calculate the radius (r) of the capillary tube using

𝑚 = 𝜋 𝑟 2𝑙 𝜌

3

Scheme of Marking: Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Introducing mercury thread 4

2 Measurement of l (2) and m (3) 5



Total 15


54




B- 4. Determining lattice constant using given XRD powder pattern You are given an x-ray diffraction pattern of a powder sample with (h, k, l) values.

Measure the angle of diffraction (θ) for three peaks mentioned by the examiner and

hence calculate the lattice constant (a) .

Scheme of marking


allotted

Marks

obtained

Remarks

if any

1 Measurement of angle (θ) 6



Total 15


55



Physics

Seat No. GROUP V (B)

B- 5. Estimation of errors for given experimental data

You are given n (≥ 5) measured values of a physical quantity. Estimate the probable

error using any one of the following formula and express the result of measurement.

1. Peter’s formula: Use n = no. of observations=8

)1(

||8453.0

nn

Zierrorprobable

2. Bessel’s formula

2/12

)1(

||6745.0

nn

Zierrorprobable

3. Measured physical quantity = Mean value + probable error

Scheme of Marking:


allotted

Marks

obtained

Remarks

if any

1 Calculation of arithmetic mean and deviation from mean

6

2 Calculation of probable error 5

3 Measured physical quantity 1


Total 15


56




B- 6. Measurement of Phase shift of RC network

-combinations by using CRO. Compare the experimental results with the theoretical values.

1. Phase angle ( )=

OA

OB1sin 2.

fCR ...2

1tan 1

Scheme of Marking : Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Obtaining trace on CRO 4

2 Measurement of phase angle (4) and comparison with theoretical Values (4) 8


Total 15


57




B- 7. Study of Half and Full adder

Write truth tables for half adder and full adder. Verify the truth tables by using given

circuit.

Scheme of Marking:


allotted

Marks

obtained

Remarks

if any

1 Truth tables Half adder(2) ,Full adder(2) 4

2 Circuit connection(4) & observations(4) 8

3 Oral 3

Total 15


58




B- 8. Computer skill testing - III (MS-Office-Excel) Given Data:

(0, 0), (1, 0.2), (1.5, 0.5), (2, 0.1), (2.5, 0.25), (3, 0.3), (3.5, 0.15), (4, 0.5)

Tabulate the data as

1st column: Serial Number ,2

nd column: x-co-ordinates and 3

rd column: y-co-

ordinates

Plot the graph of given data Scheme of Marking: Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Tabulating the data 3

2 Entering the data in worksheet 3

3 Graph 3

Printout 4

Oral 2

Total 15


59



Physics

Seat No. GROUP V (B) B- 9. Computer skill testing - IV (MS-OFFICE- Power Point presentation)

Create a power point presentation of high lights of your Seminar by preparing four slides. Present the slide-show and then take the printouts. Scheme of Marking: Sr.No. Heads of distribution of marks Marks

allotted

Marks

obtained

Remarks

if any

1 Preparation of slides 6

2 Presentation of slide show & Printout 6

3 Oral 3

Total 15


60




B-10 Use of Internet M Create new E-mail ID send and receive E-mail. Take Print out of mails. M Brows the given web site..........................

Demonstrate and Explain to the examiner. Scheme of Marking


allotted

Marks

obtained

Remarks

if any

1 Creating e –mail account 4

2 Sending and Receiving e-mail 3

3 Browsing web pages 3

4 Printout 3

5 Oral 2

Total 15


61



PHYSICS

Seat No. GROUP VI

Scheme of Marking :

Sr.

No.


Allotted

Marks

Obtained

Remarks

if any

1

2

3

Journal

Certified (10), Presentation (10)

Study tour report

Seminar reports (Two)

20

10

10

Total 50


6+,9$-, 81,9(56,7< .2/+$385 - unishivaji.ac.in · )25 &2//(*( 6+,9$-, 81,9(56,7< .2/+$385...

Documents