objectives (all chapters).doc

7/25/2019 Objectives (All Chapters).doc

1/82

Unit

MEASUREMENTS0

1

Multiple Choice Questions

1. The particle have mass

smaller of following is11101035

2. (a) Electron(b) Proton

3. (c) Neutron (d)

Quark

4. Study of physics deals with11101036

5. (a) Laws of motion

6. (b) The structure of

space and time

. (c) Interaction betweendierent particles

!. (d) All of aboe

". #hysics is a $uantitative

science %ased on primarily in1110103

10. (a) !undamental

"uantities

11. (b) #e$nition

12. (c) E%periment and

measurement13. (d) #escription of facts

14. The %ranch of physics

which deals with atomic

nucleus is called 1110103!

15. (a) Particle ph&sics (b)

Nuclear ph&sics

16. (c) Plasma ph&sics (d)

Quantum ph&sics

1. The %ranch of physics

which deals with structure

and properties of solid iscalled 1110103"

1!. (a) 'olid state ph&sics

1". (b) elatiistic

mechanics

20. (c) lassical ph&sics

21. (d) *ae mechanics

22. The products of &hips

developed from the %asics

ideas of physics are 11101040

23. (a) adio network

24. (b) T+, Network

25. (c) omputer Network

26. (d) None of these

2. Some concepts of static

electricity were introduced

%y 11101041

2!. (a) hinese (b) Plato

2". (c) Thales (d)

Archimedes-s30. Thermometer and

temperature scale were

'rstly developed %y

31. (a) .ernoulli (b)

/elin 11101042

32. (c) !ahrenheit (d)

utherford

33. The velocity of light was


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accurately determined %y11101043

34. (a) Newton (b) 0ichelson

35. (c) 1oun2 (d) !resnel36. (eutron was discovered %y

11101044

3. (a) urie (b)

!ermi

3!. (c) Lawrence (d)

hadwick

3". Transistor was invented %y11101045

40. (a) Edison (b)

.ardeen41. (c) Thomson (d)

!arada&

42. (o%el pri)e was awarded to

#a*istani scientist11101046

43. (a) #r+ Qadeer /han

44. (b) #r+ a$ 0ohammad

45. (c) Prof+ Abdus 'alam

46. (d) Prof+ 0u3taba /arim

4. +,rays were discovered %y-1110104

4!. (a) 4+4 Thomson

(b) rooks

4". (c) oent2en

(d) Lorent5

50. #hysical $uantities are

often divided into-1110104!

51.(a) Two cate2ories

52. (b) Three cate2ories

53. (c) !our cate2ories

54. (d) !ie cate2ories

55. The fundamental $uantities

which form the %ase for /S

system are 1110104"

56. (a) 0ass6 ener2& and

time

5. (b) 0ass6 force and time

5!. (c) 0ass6 len2th and time

5". (d) !orce6 len2th and

time

60. Supplementary S units are111010450

61. (a) Two (b)

Three

62. (c) !our (d) !ie

63. S unit for solid angle is11101051

64. (a) #e2ree (b) adian

65. (c) 'teradian (d)

andela

66. n eample of ase

$uantity 11101052

6. (a) Area (b) ,olume

6!. (c) Len2th (d)

,elocit&

6". ight year is a unit of11101053

0. (a) Li2ht (b)

Time

1. (c) ,elocit& (d)#istance

2. adius of proton11101054

3. (a) 7+8 % 79:7;m

(b)


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!2. (a) ms:7 (b) rad

':7 1110105

!3. (c) cm ':7 (d) cm ':8

!4. S unit of electric current1110105!

!5. (a) Ampere (b)

andela

!6. (c) 0ole (d)

0icroampere

!. The unit of pressure in

%ase unit is

!!.

1110105"

!". (a) k2 m:7s:8 (b) k2

m s:8

"0. (c) k2 m:7s8(d) None of

aboe

"1. 7or* is measured in 8oule

while energy is epressed 11101060

"2. (a) *att (b) N:s

"3. (c) 4+s (d) 4

"4. 9ne atto is e$ual to11101061"5. (a) 79:7> (b) 79:

7;

"6. (c) 797> (d) 7978

". 9ne nano is e$ual to11101062

"!. (a) 79:78 (b) 79:?

"". (c) 79:@ (d) 79?

100. 9ne centi is e$ual11101063

101. (a) 79:< (b) 79:8

102. (c) 798 (d) 79:@

103. 9ne *ilo mean11101064

104. (a) 79:< (b) 79 (d)

797?

10". The scienti'c notation of

num%er 0.0023 is epressed11101066

110. (a) 8+< % 79:< (b)

9+98


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132. (c) B0LTC (d) BLT:7C

133. The ;imensions of momentof nertia are

1110103

134. (a) B0L8C (b) B0L:8C135. (c) B0L< (b)@+>9

150. (c) @+>= (d)

@+>;151. elativistic mechanics is a

%ranch of physics whichdeals with the %odiesmoving with velocity

111010"

152. (a) 0ore than c (b)Approachin2 to c

153. (c) E"ual to c (d)0uch less than c

154. &oulom% is de'ned as111010!0

155. (a) As:7 (b) As

156. (c) A:7

s (d) A+m15. 7hich of the following is a

derived unit in S.. units?111010!1

15!. (a) 0ole (b)0etre

15". (c) andela (d) 4oule160. The @irst man to write a

%oo* on physics was111010!2

161. (a) alileo (b) Newton162. (c) Einstein (d) Aristotle

163. 9ne mile is e$ual to111010!3

164. (a) 7+@9? km (b)

7+;79km

165. (c) 7+>8 km (d) 7+?8;km

166. The unit of pressure is111010!4

16. (a)Pascal (b)

*att

16!. (c) 4oule (d)

oulomb

16". meter rod is used to

measure the length the

correct order of accuracy of

the instrument is 111010!5

10. (a) 7cm (b)

9+7cm

11. (c) 9+97cm (d) 7m

12. The time ta*en %y the lightto reach from sun to earth is

111010!6

13. (a) 7min:89sec

(b)7min:=9sec

14. (c) >min:89sec

(d)?min:89sec

15. 9ne light year is e$ual to in

metres16. 111010!


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1. (a) ?+; %797;

(b) ?+;%79:7;

1!. (c) +78D< (d)>+78D1"0. 5. 7hich of the following

is least multiple?

111010"11"1. (a) Pico(b) !emto

1"2. (c) Nano(d) Atto

193.


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194.

195.

196.

197.


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198. Answers to Short Questions199.

200. B1. 7rite dimension of pressure and force.111010"2201. B2. (ame any two units which are after the names of scientist

and epress them interms of fundamental units. 111010"3202. B3. 7hat is adian? 111010"4

203. B4. 7hat is steradian? 111010"5

204. B5.;e'ne Supplementary $uantities.111010"6

205. B6. ;e'ne Signi'cant @igures. 111010"

206. B. ;e'ne Scienti'c notation. 111010"!

20. B!. ;e'ne the term unit. 111010""

20!. B". ;e'ne #hysical $uantities. 1110110020". B10. 7hat is the #rinciple of Comogeneity of dimensions?11101101

210. B11.7hat do you mean %y dimension? 211. 11101102

212. B12.Cow many types of errors are there?

213. 11101103

214. B13. Cow second was de'ned in 1"6?

215. 11101104

216. B14. Cow weight of a %ody is measured?

21. 11101105

21!. B15. ;e'ne #article #hysics. 11101106

21". B16. 7hat is andom error and how it is removed?1110110

220. B1.7hat is systematic error and how it is removed?1110110!

221. B1!. 7hat is error and how it occurs?

222. B1". 7hat is meant %y #re'es? 11101110

223. B20. ;e'ne the term meter. 11101111

224. B21. 7hat is light year? 11101112

225. B22. &onvert the light year in meters.11101113

226. B23. Cow many signi'cant 'gures are in !000*g and why?11101114

22. B24. 7hat is a &hip? 11101115

22!. B25. ;e'ne the term *ilogram. 11101116

22".

230.

231.

232.


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2.

Unit

2!. "ECT#RS AN$ EQU%&%'R%UM2(.0

237.

238.

29. Multiple Choice Questions240.

1. A scalar is a physical quantity which is completely specified by 11102064

2. (a) Number

3. (b) Direction only

4. (c) Number with proper unit

5. (d) Number with direction

6. Name the quantity which is a vector 11102065

. (a) Density (b) Power

!. (c) Charge (d) Impulse

". A vector which has ma#nitude one is called 111020661$. (a) Resultant vector (b) Unit vector

11. (c) Null vector (d) Eual vector

12. A vector havin# same ma#nitude as that A but opposite in direction is called1110206

13. (a) Unit vector

14. (b) Resultant vector

15. (c) Negative o! a vector "

16. (d) Null vector

1. %hen a certain vector A is multiplied by a number &n' the ma#nitude of resultant vector

is equal to 1110206!

1!. (a) n # " (b) n"

1". (c) A

n

(d) n # "

2$. (wo force of ma#nitude are )1 and )2perpendicular to each other. (he ma#nitude of

their resultant will be

21. 1110206"

22. (a)2

2

2

1 FF + (b)$ $

% $& &

23. (c)$ $$ %& & (d) 'ero


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24. (he )* of force ) of ma#nitude 3$N ma+in# an an#le of 6$o with

*,a*is- are 1110200

25. (a) N (b) %N

26. (c) N (d) %*N

2. (he minimum number of forces of unequal ma#nitude whose vector sum can be ero is1110201

2!. (a) % (b) $

2". (c) + (d) ,

3$. /f a force of 1$N ma+es an an#le of 3$owith y,a*is its *,component is #iven by

31. 1110202

32. (a) %-.//N (b) ..-/N

33. (c) -*N (d) .-//N

34. (he forces )1and )2actin# on a body at an an#el

the ma#nitude of their resultant is

#iven by 1110203

35. (a)$ $

% $& &+

36. (b)$ $

% $ % $& & & &+ +

3. (c)$ $

% % % $& & & & cos+ +

3!. (d)

3". /f a force of 1$N ma+es an an#le of 3$owith *,a*is itsy,component is #iven by1110204

4$. (a) .-//N (b) *N

41. (c) *-/N (d) N

42.

43. Addition of vector A into a vector( ),0

is equivalent to 1110205

44. (a) 0ultiplication o! " and 1

45. (b) Resolution o! " and 1

46. (c) Product o! vector 1 and "

4. (d) 2ubtraction o! 1 !rom "4!. A vector A is ma+in# an an#le & & with positive y,a*is then its

*,component is #iven by 1110206

4". (a) " sin (b) "cos5$. (c) " tan (d) None o! these

51. (he scalar product of two vectors A and 0 is ero when 111020

52. (a) 3hey are perpendicular to each other

53. (b) 3hey are eual vector

54. (c) 3hey are in same direction

55. (d) 3hey are in opposite direction-


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56. A vector A and 0 are parallel to each other then 111020!

5. (a) "-1 4 "1(b) "-1 4 %

5!. (c) "-1 = (d) "-1 4 5%5". )or a vector A 111020"

6$. (a)"-" 4 * (b) " 6 " 4 "$

61. (c)" 6 " 4 % (d) "- " 4 "$

62. (he vector product of two vectors A and 0 ma+in# an an#le is #iven by

63. 111020!0

64. (a) "1 sin (b) "1 sin 65. (c) "1 cos (d)

66. /f A . 0 when vector A and 0 are parallel or anti parallel- then either A or 0 is a111020!1

6. (a) Eual (b) Perpendicular

6!. (c) Null vector (d) Not 7ero

6". /f A0 points alon# positive ,a*is- then vector A and 0 must lie in 111020!2

$. (a) y 75plane (b) 6 75plane

1. (c) 6 y5plane (d) 6 5plane2. (he force ) actin# on char#e particle &q' movin# with velocity in a ma#netic field 0 is

#iven by 111020!3

3. (a) & 4 (8- 1)

4. (b) & 4 (8 1)

5. (c) & 4

8 1

6. (d) & 4 8 1. (he cross product of vector A with itself is equal to 111020!4

!. (a) % (b) "

". (c) $" (d)Null 8ector

!$. /f A A and 0 0 - then 111020!5

!1. (a) "- 1 4 " (b) "- 1 4 *

!2. (c) "-1 4 "$

(d) "-1 4 1!3. (he dot product . . . is

!4. 111020!6

!5. (a) 'ero (b) %

!6. (c) 5% (d) None o! these

!. (he cross product

is equal to

!!. (a) 'ero (b) % 111020!

!". (c) 9G

(d) 5

"$. /f three vector A1- A2and A3represented by three sides of trian#le ta+en in order- then


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their resultant is

"1. 111020!!

"2. (a) R 4 "%5 ("$# "+)

"3. (b) R 4 *"4. (c) R 4 %

"5. (d)R 4 ("%# "$) 5 "+

"6. /f A0 then it is concluded that

". 111020!"

"!. (a) " and 1 are to each other"". (b) " and 1 are parallel to each other

1$$. (c) " and 1 are position vectors

1$1. (d) " and 1 are unit vectors

1$2. (orque is a 111020"0

1$3. (a) 2calar uantity

1$4. (b) 8ector uantity

1$5. (c) :uantity which produce angular acceleration

1$6. (d) 1oth b ; c

1$. (he ma#nitude of torque is represented by 111020"1

1$!. (a) r&cos (b) r&1$". (c) r& tan (d) r& sin

11$. (orque has a ma*imum value if an#le between r and ) is 111020"2

111. (a) *o (b) +*o

112. (c) /*o (d)


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131. (he centre of #ravity of the body is

132. 111020"

133. (a) 3he center o! the body

134. (b) 3he point at which the mass o! the body is concentrated

135. (c) 3he point at which whole o! the weight o! the body act

136. (d) "ll o! these-

13. A body will be in translational equilibrium if 111020"!

13!. (a)

4 * (b) P 4 *

13". (c)

F 4 * (d) > 4 *14$. (he second condition of equilibrium is satisfied if 111020""

141. (a) 3he vector sum o! all the !orces acting on the body is 7ero

142. (b) 3he vector sum o! all torues is 7ero143. (c) Its linear acceleration is 7ero

144. (d)None o! these

145. (he body movin# with constant velocity may be 11102100

146. (a) "t static euilibrium

14. (b) In dynamic euilibrium

14!. (c) Changing its direction

14". (d) None o! these

15$. /f,baba =+

when a b then the an#le between a and b will be11102101

151.

(a) *

o

(b) +*

o

152. (c) /*o (d)


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1$. (a) 0ultiplication

11. (b) 2ubtraction

12. (c) Division

13. (d) Resolution o! a vector

14. (he dot product of

A with itself is equal to 1110210

15. (a) "$ (b) $"

16. (c) 'ero (d) "

1. (he self cross product of unit vector is

1!. 1110210!

1". (a) Null vector

1!$. (b) suare o! magnitude

1!1. (c) 3wo 3imes

1!2. (d) &our 3imes

1!3. (orque is measured as 1110210"

1!4. (a) r& (b) r&sin

1!5. (c) r& Cos (d) r& 3an

1!6. /f the moment arm about the ori#in is ero- then torque is 11102110

1!. (a) 'ero (b) 0a6imum

1!!. (c) 0inimum (d) In!inite

1!". A body will be in rotational equilibrium /f 11102111

1"$. (a)0F= (b)

1"1. (c) 0L= (d) 0P=

1"2. (he unit vector in the direction of vector

A

++ k2ji2 is 11102112

1"3. (a)

++ k32

j3

1

i3

2

(b) +

1"4. (c) @ne (d)

++ k2ji2

1"5. %hich of the followin# is true

1"6. (a)

= ABBA 11102113

1". (b)

A.BB.A

1"!. (c)

ABBA

0=


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1"". (d) )A.B(B.A

=

2$$. (he scalar product of two vectors will be ma*imum if they are 11102114

2$1. (a) Perpendicular2$2. (b) "nti parallel

2$3. (c) Parallel

2$4. (d)"ll o! these

205. 52. esultant of two perpendicular vectors of e$ual magnitude

DsayA E will %e< 11102115

206. (a) A (b) 8A20. (c) A (d) A8

20!. 53. A-i A A789+: is e$ual to< 11102116

20". (a) AB (b) 7

210. (c) 8 (d) 9

211. 54. #osition vector of a point # DaA %A cE in FG,#lane is given %y N (d) 79 N

21. 56. The magnitudes of cross,product and dot product of two

vectors are e$ualA the angle %etween the vectors is9o (d) =;o

22$.

221.

222.

22.


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22!.

22(. Answers to Short Questions226.22. B1. ;e'ne ector

$uantities and giveeamples.

11102120

22!. B2. ;e'ne scalars and giveeamples.11102121

22". B3. ;e'ne rectangular&omponents of a ector.

11102122

230. B4. 7hat is meant %y

esolution of a ector?11102123

231. B5. ;e'ne :nit ector.11102124

232. B6. 7hat is esultantector? 11102125

233. B. ;e'ne scalar productwith eample.

11102126

234. B!. ;e'ne vector #roduct

with eamples.

1110212235. B". ;e'ne Tor$ue and give

its units. 1110212!

236. B10. 7hat is moment arm?1110212"

23. B11. 7hat is positive and

negative tor$ue? (.oard899>) 11102130

23!. B12. 7hat is the direction

of tor$ue?11102131

23". B13.Show that tor$ue andwor* have same

dimensions.11102132

240. B14.7hat is the e=ect on

tor$ue f

r or

F are

reversed.11102133

241. B15. 7hat is e$uili%rium?11102134

242. B16. 7hat is static

e$uili%rium? 11102135

243. B1. 7hat is dynamic

e$uili%rium?11102136

244. B1!.7hat is rotational

e$uili%rium?1110213

245. B1".State @irst &ondition

of e$uili%rium.

1110213!246. B20. State 2nd&ondition of

e$uili%rium.1110213"

24. B21. :nder what conditionthe resultant of twovectors is maimum?

11102140

24!. B22. :nder what conditiondot product of two vectorsis )ero? >plain. 11102141

24". B23.7hat is rectangularcoordinate system?

11102142

250. B24. &an a force directednorth %alance forcedirected west? >plain.

11102143

251. B25.7hat is the

signi'cance of d + i m

= ?>plain.

11102144252. B26. Time is directed from

#resent to future. s it avector $uantity? 11102145

253. B2. s vector #roduct&ommutative?

11102146

254. B2!. 7hat is neutral>$uili%rium? 1110214

255. B2". &an a %ody %e ine$uili%rium %y the action of


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single force? >plain.1110214!

256. B30.7hat is meant %y arm

of couple? 1110214"25. B31. 7hat is couple?

11102150

25!. B32. 7hat are li*e #arallel

forces? 11102151

25". B33. 7hat are unli*e

parallel forces?11102152

260. B34. 7hat is e=ect on a

vector when multiplied %y a

scalar $uantity? 11102153

261. B35. 7hat is the

magnitude of a vector

A

H

++ k32j

31i

32

? &an it %e given

some name?11102154

262.

263.

264.

265.

266.

267.


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2)8.

Unit

2)9. M#T%#N AN$ *#RCE270.0

272.

273.

27!. Multiple Choice Questions275.

1. The rate of change of

displacement is de'ned as1110303!

2. (a) 'peed

3. (b) ,elocit&

4. (c) Acceleration

5. (d) niform elocit&

6. The dimension of velocity is1110303"

. (a) BLTC (b)

BL0TC

!. (c) BL0T:7C (d) BLT:

7C

". The change in velocity per

unit time is called11103040

10. (a) Acceleration (b)

0omentum

11. (c) Tor"ue (d)Impulse

12. The S units of acceleration

are

13. 11103041

14. (a) kmsec:8 (b)

cmsec:8

15. (c) msec:8 (d)

msec8

16. 7hen the total

displacement is divided %y

the total time ta*enA we

get 11103042

1. (a) Aera2e distance

1!. (b) Aera2e acceleration

1". (c) Aera2e elocit&

20. (d) ,elocit&

21. f the slope of the velocity,time graph is increasing with

time at constant rateA it

shows that the %ody has11103043

22. (a) niform ne2atie

acceleration

23. (b) Aera2e acceleration

24. (c) Positie acceleration

25.(d) niform retardation

26. f the slope of velocity time

graph is decreasing with

timeA the %ody is said to

have 11103044

2. (a) Positie acceleration

2!. (b) #ecreasin2

acceleration

2". (c) niform acceleration

30. (d) etardation


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31. cceleration in a %ody is

always produced in the

direction of 11103045

32. (a) !orce (b)Tor"ue

33. (c) 0omentum (d)

,elocit&

34. 2nd aw of motion shows

the relation %etween11103046

35. (a) ,elocit& and

acceleration

36. (b) 0ass and elocit&3. (c) 0ass and

acceleration

3!. (d) #istance and

acceleration

3". The dimensions of weight

are 1110304

40. (a) BLT:7C (b) BLT:

8C

41. (c) B0LT:8C (d)

B0LT:8C

42. (ewtonIs 2nd law of

motion is also called as1110304!

43. (a) Law of 2raitation

44. (b) Law of inertia

45. (c) Law of acceleration

46. (d) Law of inertial frame

4. The 5*g mass is falling

freely with uniformvelocityA the force acting on

it will %e 1110304"

4!. (a) ;N (b)

?+>N

4". (c) 7?+@N (d)

5ero

50. cric*et %all is hit so that

it travels straight up in air

and it ta*es 3 seconds to

reach the highest point. ts

initial velocity is11103050

51. (a) 79ms:7 (b)

7;ms:7

52. (c) 8?+=ms:7

(d) 78+8ms:7

53. 7hen the clim%er reaches

the top of the mountain11103051

54. (a) Jis mass is 2reater

55. (b) Jis wei2ht is 2reater

56. (c) Jis mass is sli2htl&

smaller

5. (d) Jis wei2ht is sli2htl&

smaller

5!. mass of 5*g moves with

an acceleration of 10ms,2.

The force on it is11103052

5". (a) 79N (b)

7;N

60. (c) ;9N (d) 8N

61. The inertia of a %ody is

measured in terms of its11103053

62. (a) 0ass (b)

*ei2ht

63. (c) !orce (d),elocit&

64. >arth is 11103054

65. (a) Non:inertial frame

66. (b) Inertial frame

6. (c) eferences a%is

frame

6!. (d) Three dimensional

frame of reference


19/82

6". 7hen man Jumps o= the

groundA the reaction force

of ground is 11103055

0. (a) 'maller than its

wei2ht

1. (b) reater than its

wei2ht

2. (c) E"ual to the wei2ht

3. (d) Hero

4. The product of mass of

particle and its velocity is

called 111030565. (a) /+E (b) P+E

6. (c) Linear momentum(d)

!orce

. The S. unit of momentum

is 1110305

!. (a) k2ms:8 (b)

k2ms:7

". (c) k2m8s (d)

k28ms:7

!0. particle of mass 6.5 gm

moving along ,ais is

located at 1H 15m at t1H

5 sec and 2H 33m at t2H

13 sec. ts average velocity

is 1110305!

!1. (a) 8+=ms:7 (b)

@ms:7

!2. (c) =+=;ms:7

(d) 8+8;ms:7

!3. (eutrons are slowed down

if the stationary targets are1110305"

!4. (a) :ra&s (b)Photons

!5. (c) Proton

(d) Electrons

!6. %ody thrown upward

ma*ing certain angle with

the hori)ontal and moving

freely under the action ofgravity is called 11103060

!. (a) 'atellite

(b) ocket

!!. (c) 'pace ship (d)

Pro3ectile

!". The traJectory of proJectile

is *nown as11103061

"0. (a) 'trai2ht line(b) Parabola

"1. (c) J&perbola (d)

ircle

"2. ;uring the proJectile

motion the hori)ontal

component of velocity

"3. (a) han2es with time11103062

"4. (b) .ecome 5ero

"5. (c) #oes not chan2e"6. (d) Increase with time

". 7hen the proJectile

reaches the highest point

of traJectory the vertical

component of velocity is

"!. 11103063

"". (a) 'mall (b)

0a%imum

100. (c) ,ios (d)Hero

101. otion of proJectile is11103064

102. (a) Kne dimensional

103. (b) Three dimensional

104. (c) Two dimensional

105. (d) None of the aboe


20/82

106. The hori)ontal range of

proJectile is11103065

10. (a) (b)

$i$v sin$

g

10!. (c)

$i$v sin cos

g

(d)

$i$v sin $

g

10". The maimum height

attained %y proJectile is

11103066

110. (a) (b)

2

iv sin

g

111. (c) (d)

112. The velocity of proJectile is

maimum 1110306

113. (a) At half of hei2ht

114. (b) At hi2hest point

115. (c) 4ust before strikin2

the 2round and at the pointof pro3ection

116. (d) At one fourth of

ma%imum hei2ht

11. Span of the %oard,Jump at

given velocity depends

upon 1110306!

11!. (a) 0ass of the 3umper

11". (b) An2le of 3umper

120. (c) Jei2ht of 3umper121. (d) ,elocit& of 3umper

122. f the slope of velocity time

graph gradually decreases

then the %ody is said to %e

moving with 1110306"

123. (a) e acceleration

124. (b) niform elocit&

125. (c) :e acceleration

126. (d) None of the aboe

12. snoo*er %all moving with

velocity collides head on

with another snoo*er %all

of same mass at rest. f

collision is elasticA the

velocity of the second %all

is 1110300

12!. (a) Hero (b)

In$nit&

12". (c) (d) 8130. The hori)ontal component

of velocity of proJectile

moving with initial velocityof 500ms,1 at angle of 60o

with ,ais is e$ual to1110301

131. (a) Hero (b)

;99ms:7

132. (c) 8;9ms:7 (d)7999ms:7

133. collision in which %oth

/.> and momentum are

conserved 1110302134. (a) Elastic collision

135. (b) Inelastic collision136. (c) .oth elastic and

inelastic

13. (d) None of these13!. f i is the velocity of

proJection and is the

angle which the proJectile

ma*es with ,ais then thevertical component of

velocity any time t is

13". 1110303

140. (a) ,icos (b) ,isin

141. (c) ,isin:2t(d) ,icos:2t


21/82

142. n proJectile motion

hori)ontal range depends

upon 1110304

143. (a) .oth initial elocit&and an2le of pro3ection

144. (b) An2le of pro3ection145. (c) Initial elocit&146. (d) None of these

14. ;imensions of impulse are

similar to dimensions of1110305

14!. (a) *ork (b)

Tor"ue

14". (c) !orce (d)

0omentum

150. The %allistic traJectory is

the path followed %y1110306

151. (a) Powered and

un2uided missile

152. (b)npowered andun2uided missile

153. (c) npowered and2uided missile

154. (d) Powered and 2uidedmissile

155. #owered and guidedmissiles are used for

111030

156. (a) Lon2 ran2e15. (b) 0edium ran2e15!. (c) 'hort ran2e

15". (d) ,er& short ran2e160. efore launch of any roc*et

the mass of fuel of the

roc*et is a%out 111030!

161. (a) @9F of rocket mass

162. (b) ;9F of rocket mass

163. (c) =9F of rocket mass

164. (d) >9F of rocket mass

165. same force K@I is applied

respectively on two

di=erent masses m1and m2moving with acceleration a1and a2. dentify their mass

acceleration ratio111030"

166. (a) (b)

167. (c) (d) All of

these

16!. 43. The speed of earthrevolving around the Sunis< 111030!016". (a) 8796999 mMs (b)

7999 mMs

10. (c) ?>99 mMs(d) 8?@99 mMs

11. 44. %ullet shot straightup returns to its startingpoint in 10 sec. ts initialspeed was ms:7 (b)8=+; ms:7

13. (c) =? ms:7 (d) ?>ms:7

14. 45. 7hen a %all is thrownstraight upA theacceleration at its highestpoint isarth is 1110405

!0. (a) ; % 7989kwh (b) =8

% 797Dkwh

!1. (c)8 % 797?kwh(d) < % 797>kwh

!2. gas 'lled %alloon

ascending upward possess1110405!

!3. (a) hemical ener2&

!4. (b) /+E

!5. (c) P+E

!6. (d) .oth of (b) and (c)

!. Cow much energy isproduced %y %urning 1 ton

coal in Jouls? 1110405"

!!. (a)

!". (c) 7 % 7979 (d) < %

7978

"0. The energy released in the

'ssion of an atom of

uranium in Joules isQ.."1. 11104060

"2. (a) @ % 7988 (b)


27/82

101. (d) Tension in strin2

102. 7or* done on a %ody for

increasing velocity results

in can %e written as11104064

10!. (a)

%

$ m8 (b)

%P-v

$

ur r

10". (c) 2mP2

(d) All

110. man carries a %uc*et of

water of 1 *g for 10m then

wor* done is 11104065

111. (a) 794

(b) 7;4

112. (c) 8+;4

(d) 94

113. Two %odies and of mass1*g and 2*g respectivelyhave same momentum.7hich one has greater />?

11104066

114. (a) annot be

determined115. (b) .116. (c) .oth hae the same

/+E

11. (d) A11!. force acts on a %ody at

an angle of 45

to the

direction of motion thenchange occurs in for a disc is1110505

311. (a) m8 (b) m8

312. (c)m8 d) None

of these

26. The value of KgI at the

centre of earth is1110506

313. (a) Hero (b)#ouble

314. (c) In$nite

(d) Jalf

2. The critical velocity of

satellite or%iting close to

earth is< 111050

315. (a) ;+? kmMsec (b) @+?kmMsec

316. (c) D+? kmMsec (d) >+?

kmMsec

2!. Two %odies each of mass

4000*g at a separation of

2mA the force %etween

them is 111050!31. (a) arth

towards its centre the

value of KgI 111050!2


35/82

32". (a) #ecreases

330. (b) Increases

331. (c) emains constant


33. The weight of a man in an

elevator moving down with

an acceleration ".! mRs2

will %e 111050!3

333. (a) Ne2atie

(b) #ouble

334. (c) Jalf (d)

Hero34. rti'cial gravity is provided

to the satellite %y111050!4

335. (a) ,elocit&

336. (b) *ei2ht

33. (c) Acceleration

33!. (d) otatin2 around its

a%is

35. To create arti'cial gravityAthe fre$uency of space

station a%out its own ais

is 111050!5

33". (a) (b)

340. (c) 8 (d) 836. satellite moving around

the >arth constitute9N (b)

;>9N

36. (c) 79N (d)

Hero

3. 4!. nternationalTelecommunication

Satellite 9rgani)ationoperates at microwavefre$uencies of< 111050"!3!. (a) =6@6> and 79 J53". (b) =6@677 and 7= J53!0. (c) =6@6> and 78 J53!1. (d) =6>677 and 7@ J5

3!2. 4". 7hen a %ody iswhirled in a hori)ontalcircle %y means of a stringAthe centripetal force issupplied %yST .

11105120

423. B1. @rom the theoriespresented %y (ewton and>instein which one is %etterand why?

11105121

424. B1!. 7hat is the weight of

a %ody in freely falling lift?11105122

425. B1". 7hat is the minimumtime for a low Mying

satellite to complete one

rotation around the earth?11105123

426. B20. >plain the relationfor rotational /ineticenergy? 11105124

42. B21. 7hat is the

centripetal force in

vectorial form?1110512542!.

429.

430.

431.

432.

433.


39/82

!!.

Unit

!(. *&U%$ $NAM%CS!).0

438.

439.

440.Multiple Choice Questios1. The drag force increases as

the speed of o%Ject9 torr (d)

7


43/82

562. (c) 0otion on hori5ontal

surface

563. (d) 0otion of all t&pes

40. Mowing li$uid has1110603

564. (a) /inetic ener2&

565. (b) Potential ener2&

566. (c) Pressure ener2&

56. (d) All of aboe

41. The word Muid means1110604

56!. (a) To ow (b) To

fall

56". (c) To rise (d) To

oppose

42. The a%ility to resist is

called 1110605

50. (a) 'tren2th

(b) !riction

51. (c) esistance

(d) Elasticit&

43. The term

2v2

1

is1110606

52. (a) #&namic pressure

53. (b) 'tress

54. (c) 'tatic pressure

55. (d) All of these

44. The %lood is a Muid which is111060

56. (a) Incompressible

5. (b) ompressible

5!. (c) Non:iscous

5". (d) All of aboe

45. The term gh in Muid

dynamics is *nown as111060!

5!0. (a) 'tatic pressure

5!1. (b) #&namic pressure

5!2. (c) Pressure

5!3. (d) ohesion

46. person standing near a

fast moving train can fall111060"

5!4. (a) Towards train

5!5. (b) Awa&

5!6. (c) No eect

5!. (d) None of these

4. The pressure of li$uid is

high where its speed is111060!0

5!!. (a) Ji2h

5!". (b) Low

5"0. (c) onstant

5"1. (d) In$nite

4!. 7hen velocity of falling

%ody is )ero then

acceleration is< 111060!1

5"2. (a) Hero

5"3. (b) 0a%imum

5"4. (c) 0inimum5"5. (d) E"ual to 2

4". @or which position the

maimum %lood pressure is

smallest in value111060!2

5"6. (a) 'tandin2

5". (b) 'ittin2

5"!. (c) L&in2

5"". (d) Kne-s heads50. 7hen a fog droplet falls

down with an acceleration

then net force acting on it

is 111060!3

600. (a) m2 !#(b) m2 !#

601. (c) !#: m2 (d)

Hero


44/82

602. 51. The lower reading of

%lood pressure is called of mass is

maimum when #.> of the

spring is 11100!0

13. (a) 0a%imum (b)

Hero

14. (c) Positie (d)

Ne2atie

15. The oscillation in which

amplitude decreases with

time is 11100!1

16. (a) #amped

1. (b) ndamped

1!. (c) !orced

1". (d) 'imple oscillation

1!0. 7hen pendulum is at

etreme position then its

/.>. 11100!2

1!1. (a) 0a%imum

1!2. (b) Hero

1!3. (c) Ne2atie1!4. (d) None of these

1!5. f mass of %o% of simple

pendulum increases then

its time period 11100!3

1!6. (a) #ecreases

1!. (b) Increases

1!!. (c) emains constant

1!". (d) None

1"0. Time period of simple

pendulum is directly

proportional to 11100!4

1"1. (a) (b)

1"2. (c) (d)

1"3. 50. The fre$uency of waves produced inmicrowave oven is9o (d)


55/82

half wavelength in1110!06"

10". (a) onstructie

interference110. (b) #estructie

interference

111. (c) .oth

112. (d) None of aboe

113. The path di=erence is an

integral multiple of

wavelength in 1110!00

114. (a) onstructie

interference

115. (b) onstructie and

destructie interference

116. (c) #estructie

interference

11. (d) None of aboe

11!. tuning for* is a source of1110!01

11". (a) Li2ht (b)

Jeat120. (c) 'ound (d)

*ae

121. The velocity of sound invacuum is

1110!02

122. (a)


56/82

153. (c) Trou2h (d)

rest

154. 7hen a spring under

tension is pluc*ed at one

end the wave generated is1110!0!1

155. (a) Lon2itudinal

156. (b) Transerse

15. (c) '"uare

15!. (d) ompressional

15". The wavelength in terms of

fre$uency and speed is

1110!0!2

160. (a) (b) 161. (c) (d) f

162. person moves with a

speed half of speed of

sound away from stationary

source of sound. Then the

fre$uency of sound waves

heard %y the person will1110!0!3

163. (a) emain same

164. (b) .ecome double

165. (c) .ecome half

166. (d) .ecome one fourth

16. s an empty test tu%e is

'lled with waterA fre$uency

of air column1110!0!4

16!. (a) #ecreases

16". (b) emains same

10. (c) Increases

11. (d) #ecreases to 5ero

12. n which case ;opplerIs

e=ect is used1110!0!5

13. (a) adar

14. (b) 'onar

15. (c) 'peed of stars


1. atio of the fundamental

fre$uency of an open end

and closed end organ pipe

of same length is< 1110!0!6

1!. (a) 87

(b) 78

1". (c) 77 (d) =7

1!0. vi%rating string under

certain tension produces

100vi%Rsec when Tension

increase 4 timesA the

num%er of vi%rations per

second will %ecomecps24. (c) @ 79:=cps25. (d) @ 797=cps

26. The direction in which lightenergy is carried is called a

1110"044

2. (a) *ae front2!. (b) Locus

2". (c) a&30. (d) None of these

31. nterference e=ects of light

were detected %y1110"045

32. (a) Thomas 1oun2

33. (b) Newton

34. (c) .ra22

35. (d) 0a%well

36. The light spread from the

point source in the form of1110"046

3. (a) Plane wae front

3!. (b) &lindrical wae

front

3". (c) Elliptical wae front

40. (d) 'pherical wae front

41. >lectromagnetic waves

transport


60/82

42. (a) Ener2& onl&1110"04

43. (b) 0omentum onl&

44. (c) .oth momentum andener2&

45. (d) 0omentum and

disturbance

46. The velocity of light in air

or vacuum is

ms

:7

50. (d) < 7979ms:7

51. Vight reaches the earthfrom sun in nearly

1110"04"

52. (a) 7; min53. (b) 79 min 89 sec54. (c) > min 79 sec55. (d) > min 89 sec

56. ongitudinal waves do notehi%it

5. 1110"0505!. (a) eection(b) efraction5". (c) #iraction(d) Polari5ation

60. The distance %etween two

adJacent %right fringes in

young eperiment depends

upon on 1110"051

61. (a) 'lits separation

62. (b) #istance between slits

and screen

63. (c) *ae len2th


65. 9ne angstrom is e$ual to1110"052

66. (a) 79:>cm

(b) 79:@m

6. (c) 79:79m (d) 79:>

nm

6!. ;i=raction is a special type

of 1110"053

6". (a) Polari5ation

0. (b) Interference

1. (c) eection


3. FoungIs dou%le slit

eperiment proves1110"054

4. (a) *ae nature of li2ht

5. (b) Particle nature ofli2ht

6. (c) #ual nature of li2ht

. (d) None of these

!. Two light waves which are

not coherent cannot1110"055

". (a) Interfere

!0. (b) .e diracted

!1. (c) .e polari5ed in thesame plane

!2. (d) None of these

!3. 7hich of the following rays

cannot %e polari)ed?1110"056

!4. (a) 'ound waes

!5. (b) Li2ht waes

!6. (c) :a&s

!. (d) Infrared ra&s!!. CuygensIs principle is used

to 1110"05

!". (a) E%plain polari5ation

"0. (b) Locate the wae front

"1. (c) !ind the speed of

li2ht

"2. (d) !ind the Inde% of

refraction


61/82

"3. t a very large distance

from a point source we get1110"05!

"4. (a) An elliptical waefront

"5. (b) A c&lindrical wae

front

"6. (c) A spherical wae

front

". (d) A plane wae front

"!. n FoungIs dou%le slit

eperiment the condition

for destructive interferenceis- 1110"05"

"". (a) d sin (m %

$ ) 100. (b) dsin m

101. (c) d sin (m :%

$ ) 102. (d) 8d sin m

103. n FoungIs dou%le slit

eperiment the fringe

spacing Dor fringe widthE is

e$ual to 1110"060

104. (a) (b)

105. (c) (d)

106. n FoungIs dou%le sliteperimentA the positionsof the %right fringes aregiven %y 1110"06110. (a) &m (m 7) LMd

10!. (b) &m m

10". (c) &m (m U) !L

110. (d) &m L

!

(m %

$ )111. The velocity of light was

determined accurately %y1110"062

112. (a) Newton (b)0ichelson

113. (c) Ju&2en (d)1oun2114. Soap 'lm in sunlight

appears coloured due to1110"063115. (a) #ispersion of li2ht116. (b) #iraction of li2ht11. (c) 'catterin2 of li2ht11!. (d) interference of li2ht

11". white light %eam when

passed through a prism is1110"064

120. (a) #eiated

(b) #iracted

121. (c) #ispersed (d)Polari5ed

122. The appearance of colours

in thin 'lms is due to1110"065

123. (a) #iraction (b)

#ispersion

124. (c) Interference (d)

Polari5ation

125. 7hen a ray of light entersglass from air1110"066

126. (a) Its wae len2th

increases

12. (b) Its wae len2th

decreases

12!. (c) Its fre"uenc&

increases

12". (d) Its fre"uenc&

decreases130. The %lue of the s*y is due

to 1110"06

131. (a) #iraction of li2ht

132. (b) Interference of li2ht

133. (c) Polari5ation of li2ht

134. (d) 'catterin2 of li2ht

135. (ewtonIs rings are formed

due to

136. 1110"06!


62/82

13. (a) #iraction of li2ht

13!. (b) Interference of li2ht

13". (c) Polari5ation of li2ht

140. (d) eection of li2ht141. The phase change of 1!0o

is e$ual to the path

di=erence of 1110"06"

142. (a) (b) M8143. (c) 8 (d)


63/82

1. (a) Plane polari5ed1!. (b) npolari5ed1". (c) ircularl& polari5ed

1!0. (d) Ellipticall& polari5ed1!1. typical di=raction grating

has a%out 400 to 5000 linesper< 1110"0"1!2. (a) 0eter (b)

0illimeter

1!3. (c) Nanometer (d)entimeter

1!4. >lectromagnetic waves are

produced %y1110"0!0

1!5. (a) Accelerated bodies

1!6. (b) har2es at rest

1!. (c) Accelerated char2es

1!!. (d) har2es in uniform

motion

1!". @or getting more order of

spectra %y di=raction

grating 1110"0!1

1"0. (a) Number of lines areincreased

1"1. (b) Number of lines are

decreased

1"2. (c) sin2 pol&chromatic

li2ht

1"3. (d) All of these

1"4. The path di=erence OsP for

constructive interference

should %e1"5. 1110"0!2

1"6. (a) s(b)s ms:7

412. (c) < 7979ms:7413. (d) < 79Dms:7

33. n optical '%re with its

protective case may %e

typically 1111006!

414. (a) @+9 cm (b) @

mm

415. (c) D+@8 cm

(d) D mm

34. Total con'ned light is

o%tained %y

416. 1111006"

41. (a) Total internalreection

41!. (b) continuous refraction

41". (c) .oth (a) and (b)


35. @or glass,air %oundryA the

value of critical angle &1111000

421. (a) =7+;o (b) =7o

422. (c) =7+>o

(d)=7+8o

36. Cow many types of optical

'%res are?1111001

423. (a) Two t&pes (b)

Three t&pes

424. (c) !our t&pes

(d) Kne t&pe

3. Types of optical '%res are1111002

425. (a) 'in2le mode 2raded

inde%

426. (b) 0ulti mode step

inde%

42. (c) 0ulti mode 2raded

inde%

42!. (d) All of these

3!. The diameter of single

mode step '%re core is1111003

42". (a) 79m (b)


71/82

step inde '%re1111004

431. (a) 79

(b) 78432. (c) 7= (d) 7@

40. The light emitted from >;

has a wave length1111005

433. (a) 7+


72/82

462. (b) .ends awa& from a

normal

463. (c) 'uers no chan2e in

direction


50. 7hen a ray of light enters

from a medium of high

refractive inde to that of

lower refractive indeA

speed of light111100!5

465. (a) #ecreases466. (b) Increases

46. (c) Is not eected

46!. (d) None of these

51. aterial having high

refractive inde has111100!6

46". (a) Low densit&

40. (b) Ji2h densit&

41. (c) Hero densit&42. (d) ,er& low densit&

52. s optical '%re waves

acts as transmission carrier

waves 111100!

43. (a) Li2ht (b)

'ound

44. (c) 0echanical (d)

Jeat

53. 7e *now that 2 H "0when

1 H cA then SnellIs law

ta*es the form111100!!

45. (a) 'in c

%

$

n

n

46. (b) 'in c n7n8

4. (c) 'inc

$

%

n

n

4!. (d) None of aboe54. Cigh energy ,rays and

radio waves di=er in111100!"

4". (a) 'peed

4!0. (b) !re"uenc&

4!1. (c) *ae len2th

4!2. (d) .oth (b) R (c)

4!3. 55. The optical '%er is

covered for protection %y a111100"0

4!4. (a) lass 4acket

4!5. (b) Plastic 4acket

4!6. (c) opper 4acket

4!. (d) Aluminum 4acket

4!!. 56. f magnifying power

of magnifying glass is 3A

then focal length will %eplain. 11111110

263. B2. Live four eamples of a natural process that involve an

increase in entropy. 11111111

264. B3. 7hat is di=erence %etween universal gas constant andolt)man constant? 11111112

265. B4. s heat energy is a state varia%le? >plain.11111113

266. B5. 7hy must more wor* %e done when gas is heated at constantpressure than constant volume? 11111114

26. B6. 7hat is the e=ect on eciency of car not engineA if

temperature of the sin* only is decreased?11111115

26!. B. 7hat is the triple point of water? ;e'ne the unit /elvin on

this %ase. 11111116

26". B!. 7hat is the limitation of 1stlaw of Thermodynamic which is

covered %y law? 1111111

20. B". 7hat is net change in the >ntropy of a system when a &arnot

cycle is completed?

21. 1111111!

22. B10. 7hat is meant %y meta%olism? pply 1st law of

thermodynamic to eplain it. 1111111"

23. B11. 7hy does the temperature drop in epansion?11111120

274.

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