# Punjab PSC Exam: Electronics MCQs (Practice_Test 3 of 13)

Glide to success with Doorsteptutor material for IAS : fully solved questions with step-by-step explanation- practice your way to success.

- Consider the parallel RLC circuit having R = 1, L = 1H, C = 1F. What type of response will the circuit produce?
- Under damped
- Over damped
- Critically damped
- none of these

Answer: a

- How much inductance is needed to resonate at 5 kHz with a capacitance of 12nF?
- 2652 H
- 11.844 H
- 3.333 H
- 84.33 mH

Answer: d

- The difference between the half power frequencies is called the
- quality factor
- resonant frequency
- bandwidth
- cutoff frequency

Answer: c

- A parallel RLC circuit has C = 0.25F & L = 2H. The value of R which will create unity damping factor is
- 1
- 2
- 0.5
- 4

Answer: b

- A zero of the transfer function H (s) = 10 (s + 1) / (s + 2) (s + 3) is at
- 10
- -1
- -2
- -3

Answer: b

- On the Bode magnitude plot, the slope of the pole 1/ (5 + j?) 2 is
- 20 dB/decade
- 40 dB/decade
- -40 dB/decade
- -20 dB/decade

Answer: c

- On the bode phase plot, the slope of [1 + j10w-w ^ ] ^ 2 is
- 45° /decade
- 90° /decade
- 135° /decade
- 180° /decade

Answer: d

- In an electric circuit, the dual of resistance is
- conductance
- capacitance
- open circuit
- inductance

Answer: a

- In a series RLC circuit, which of these quality factors has the steepest curve at resonance?
- Q = 20
- Q = 12
- Q = 8
- Q = 4

Answer: d