SRM University 2007 B.Tech Computer Science and Engineering BANK : - Question Paper

Part – B
28. Derive the expression for co-efficient of coupling in coupled circuits and write the significance of it.
29. Explain how dot rule is applied in coupled circuits?
30. Derive the expression for co-efficient of critical coupling
31. Explain the detail about the subsequent.
(i) Multi winding coupled circuit
(ii) Series connection of coupled inductors
(iii) Parallel connection of coupled inductors

32. What are single tuned circuits. discuss it also draw its frequency response curve
33. What are double tuned circuits discuss it draw its frequency response curve.
34. Explain in detail (i) magnetic fringing (ii) magnetic leakage.
Problems
35. For the provided single tuned circuit, determine (i) the resonant frequency (ii) the o/p voltage at resonance (3) the maximum o/p voltage.
presume Rs>> cor L1 ; K = 0.9
36. For the circuit shown in fig. 4.36 obtain the ratio of output voltage to the source voltage
37. Find the voltage across the 10? resistor for the provided circuit
38. For the subsequent circuits write mesh equations.
& issues


UNIT – V : TRANSIENTS AND NETWORK ELEMENTS
Part – A
1. When is a circuit stated to be in steady state?
2. What is transient state?
3. Define transient time
4. What is natural response?
5. Differentiate ranging from natural and forced response.
6. Define forced response
7. Sketch the transient DC response of an RL circuit
8. What is time constant?
9. What is the time constant of RL series circuit
10. Draw the transient response of an RC network for a unit step input
11. What is the time constant for an RC network?
12. Sketch the transient current curve for the critically damped RLC network
13. Define unit step function
14. Define driving point impedance and admittance
15. What are poles and zeros?
16. When is a network function stated to be stable?
17. Give the necessary conditions for driving point function
18. Give the necessary conditions for transfer function
19. For N (s) = S+5 / S2 +9s+18, find the pole zero plot.
20. Find the poles and zeros of N(s) S+1 / S2 +4S+8
21. Give the stability criterion for active network
22. State Routh – Huritz theorem
23. What is a port?
24. What is a 2 port network?
25. What are active and passive ports?
26. Define Z parameter for a linear 2 port network.
27. What is the other name of
(a) Open circuit impedance parameter
(b) Short circuit admittance parameter
28. Define Y parameters for a general two port network
29. What are H11 and H21 ? Express them in terms of input and the output currents and voltages.
30. Express h12 and h22 in terms of V1, I1, V2, I2.
31. What are g11 and g12? Express in terms of V1, I1, V2, I2.
32. What are g21 and g22? Express in terms of V1, I1, V2, I2.
33. Write the transient current formula when an RL series circuit is connected to a step voltage of V volts.
34. A dc voltage of 100V is applied to a series RL circuit with R=25?. What will be the current in the circuit at twice the time constant?
35. Distinguish ranging from steady state and transient response of an electrical circuit
36. What are critical frequencies? Why are they called so?
37. What is critical damping?
38. Define damping ratio
39. Write the expression for the natural frequency for a RLC series circuit
40. What is logarithmic decrement?

Part – B
41. Discuss in detail transient DC response of an RL circuit.
42. A series RL circuit with R=30? and L = 15H has a constant voltage V=60V applied at t=0, when the switch is closed. Determine the current I, the voltage across the resistor and inductor.
43. Write short notes on transient response of an RC circuit for a DC voltage.
44. A series RC circuit consists of a resistor of 10? and a capacitor of 0.1F. A constant voltage of 20V is applied to the circuit at t=0. find the current formula. Determine the voltages across the resistor and the capacitor.
45. Discuss the transient response of an RLC series circuit for a DC input.
46. The circuit shown in fig 5.46 consists of resistance, inductance and capacitance in series with a 100V constant source when the switch is closed at t=0, obtain the current transient.

47. Write short notes on sinusoidal response of RL circuit
48. In the provided circuit (fig 5.48), determine the complete solution for the current, when the switch is closed at t=0. Applied voltage is v(t) = 100 cos(103 t + ?/2). Resistance R=20? and inductance L = 0.1H.





49. Write short note on sinusoidal response of RC circuit.
50. Write short note on sinusoidal response of RLC circuit.
51. A voltage of v(t) = 50 cos (102 + ?/4) is applied to a series RC circuit, when a switch is closed at t=0. Determine the complete solution for current if R=10? and C=1?F.
52. A voltage v(t) =400 cos(500t +?/4 ) is applied to an RLC series network, when a switch is closed at t=0. Determine the complete solution for the current, if R=15?; L= 0.2H and C=3 ?F.
53. For the provided 2 port network, obtain the firing point impedance Z11 (s) and the driving point admittance Y11 (s). Also obtain the transfer impedance Z21(s)
54. Find the Y parameters for the provided network
55. Find the h parameters for the provided network
56. Write short notes on stability criterion for active network
57. Discuss in detail transfer functions of a 2 port network. Also mention the necessary conditions for driving point and transfer functions.
58. For the provided circuit, determine the transfer functions G21 (s) and Z21 (s) and driving point admittance Y11 (s).
59. Derive the expressions for Z parameters in terms of Y parameters and vice versa
60. Find the z parameters for the provided circuit

Earning:   Approval pending.