SRM University 2007 B.Tech Electronics and Communications Engineering BANK : CIRCUIT THEORY- UNIT V - Question Paper

ques. BANK
UNIT V
PART A
1. What do you mean by resonance?
2. What are series resonance?
3. What are parallel resonance?
4. What do you mean by anti resonance?
5. Define Q factor
6. What do you mean by Dynamic resistance?
7. Write down the characteristics of series resonance.
8. Write down the characteristics of parallel resonance.
9. Write down the relationship ranging from resonance frequency and Q factor.
10. Write down the expression for resonant frequency in case of series resonance
11. Write down the expression for resonant frequency in case of parallel resonance with internal resistance.
12. Write down the formula for Q factor with reference to energy stored.
13. What is the phaser diagram?
14. What are the relationship ranging from selectivity and bandwidth?
15. What is the pspice statement for voltage controlled voltage source?
16. What are the pspice statement for current controlled voltage source?
17. What is the meaning of .OP statement in Pspice?
18. What do you mean by. Probe statement in Pspice?
19. What do you mean by .AC statement in Pspice?
20. What is .trans statement in Pspice?
21. Write down the Pspice syntax for piecewise linear waveform.
22. Write down the Pspice syntax for exponential waveform.
23. Write down the Pspice syntax for pulse waveform.
24. Write down the Pspice syntax for single frequency modulated waveform.
25. Write down the Pspice syntax for Sin linear waveform.
26. List out the Pspice DC analysis control statements.
27. What are kind of dependent sources.
28. What do you mean by DC sweep analysis.
29. What is .Print Ac Statement in pspice
30. What are transient analysis in Pspice.
31. What do you mean by amplification in series resonance.
32. Write down the pspice syntax for voltage controlled current source.
33. Write down the pspice syntax for current controlled current source.
PART B
1. Explain the variation of impedance admittance and current with respect to frequency.
2. Derive the expression for resonant frequency and relationship ranging from cutoff frequencies in case of series resonance.
3. A series RLC circuit consists of a resistance of 1K and an inductance 100mH in series with capacitance 10pF.If 100V is applied as input across the combination determine the resonant frequency Maximum current in circuit, Q factor of the circuit, the half power frequency.
4. Determine the quality factor of a coil for the series circuit consisting of R = 100E, L=0.1H, C=10mu obtain the expression for resonance frequency of a tank circuit.
5. Explain reactance curves in parallel resonance.
6. A series RLC circuit has a quality factor of five at 50 rad/s .The current flowing through the circuit at resonance is 10A and supply voltage is 100V .the total impedance of the circuit is 20E.Find the circuit constants
7. A voltage V (t)=10sin wt is applied to series RLC circuit .At the resonant frequency of the circuit, the maximum voltage across the capacitor is obtained to be 500V.Moreover, the bandwidth is known to be 400rad/s and the impedance at resonance is 100 ?. obtain the resonant frequency also obtain the values of L and C.
8. Find the value of L with internal resistance 5? is connected with a capacitor of reactance –j12 and internal resistance 10E at which the circuit resonates at 1000rad/sec.
9. Two impedance of Z1=20+j10 and z2=10-j30 are connecte4d in parallel and this combination is connected in series with z3=30+jX. obtain the value of X, which will produce resonance.
10. An AC voltage source of value 200v, 50hz, an inductor of reactance j25? and resistance 50 ? has connected in series. Mark the range of I for maximum and minimum values of R, and maximum power consumed in the circuit.

11. In the circuit shown beneath an inductance of 0.1H having a Q is in parallel with a capacitor. Determine the value of capacitance and coil resistance at resonant frequency of 500 rad/sec.


12. A series RLC circuit consists of a 50? resistance, 0.2 H. inductance and 10uf capacitance with an applied voltage of 20V.Determine the resonant frequency. obtain the Q factor of the circuit. calculate the lower and upper frequency limits and also obtain the bandwidth of the circuit.

13. Find out the node voltage and current though every resister.

14. Find out the pspice solution for voltages of every node

15. For the provided series RLC circuit obtain the resonance condition and plot the graphs.
16. Derive an expression for resonant frequency in case of parallel resonance.
17. Find the magnitude of the current and its real imaginary components and its phase with respect to the source.

Earning:   Approval pending.