a text book of questions

8/13/2019 a text book of questions

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Code No: R07A1EC05 R07 Set No. 2I B.Tech Examinations,December-January, 2011-2012

NETWORK ANALYSISCommon to BME, E.COMP.E, ETM, E.CONT.E, EIE, ECE

Time: 3 hours Max Marks: 80Answer any FIVE Questions

All Questions carry equal marks

1. Find the Z and Y parameters of the circuit shown in gure 4. [16]

Figure 4

2. Draw the graph of the network shown in the gure 8. Obtain a tree thereof. What

is the number of mesh currents required for the network? [16]

Figure 8

3. Design a T-section attenuator to give an attenuation of 60 dB and to work in a line

of 500 impedance. [16]4. State and Explain with proof of Reciprocity Theorem. [16]

5. Four resistors are in parallel. The current in the rst three resistors are 4A, 5Aand 6A respectively. The voltage drop across the fourth resistor is 200V. The totalpower dissipated is 5kW. Determine the values of resistances of the branches andthe total resistance. [16]

6. A series circuit consists of R and L and is supplied by a sinusoidal ac voltage source.Derive expressions for

(a) impedance,

(b) current,

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Code No: R07A1EC05 R07 Set No. 2(c) power factor. Draw the vector diagram. [16]

7. (a) Explain the phenomenon of resonance. Derive the formula for the resonantfrequency of the series resonant circuit.

(b) Give the quality factor in terms of Bandwidth.

(c) Find the natural frequency of a series RLC circuit in which R = 200 ohms, L= 0.15 H and C = 5 micro Farads. [8+4+4]

8. Derive the transient response of RLC series circuit with unit step input. [16]

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(a) impedance,

(b) current,

(c) power factor. Draw the vector diagram. [16]




(c) Find the natural frequency of a series RLC circuit in which R = 200 ohms, L

= 0.15 H and C = 5 micro Farads. [8+4+4]4. Draw the graph of the network shown in the gure 8. Obtain a tree thereof. What


Figure 85. Four resistors are in parallel. The current in the rst three resistors are 4A, 5A

and 6A respectively. The voltage drop across the fourth resistor is 200V. The totalpower dissipated is 5kW. Determine the values of resistances of the branches andthe total resistance. [16]


3


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Code No: R07A1EC05 R07 Set No. 4

Figure 4

7. State and Explain with proof of Reciprocity Theorem. [16]

8. Design a T-section attenuator to give an attenuation of 60 dB and to work in a lineof 500 impedance. [16]

4


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(a) impedance,

(b) current,


3. Draw the graph of the network shown in the gure 8. Obtain a tree thereof. Whatis the number of mesh currents required for the network? [16]

Figure 8


5. State and Explain with proof of Reciprocity Theorem. [16]6. Find the Z and Y parameters of the circuit shown in gure 4. [16]

Figure 4

5


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Code No: R07A1EC05 R07 Set No. 17. Design a T-section attenuator to give an attenuation of 60 dB and to work in a line

of 500 impedance. [16]




6


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(a) impedance,

(b) current,





Figure 4

5. State and Explain with proof of Reciprocity Theorem. [16]




7. Design a T-section attenuator to give an attenuation of 60 dB and to work in a lineof 500 impedance. [16]

7


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Code No: R07A1EC05 R07 Set No. 38. Draw the graph of the network shown in the gure 8. Obtain a tree thereof. What


Figure 8

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