Explore topic-wise MCQs in Network Theory Questions and Answers.

This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

In a series RLC circuit R = 10 kΩ, L = 0.5 H and C = \(\frac{1}{250}\) μF. Calculate the frequency when the circuit is in a state of resonance.

A. 4.089 × 104 Hz
B. \(\frac{11111.1}{π}\)Hz
C. 4.089π × 104 Hz
D. \(\frac{1}{π}\) × 104 Hz
Answer» C. 4.089π × 104 Hz
Discussion
2.

For the circuit given below, if the frequency of the source is 50 Hz, then a value of to which results in a transient free response is?

A. 0
B. 1.78 ms
C. 7.23 ms
D. 9.21 ms
Answer» C. 7.23 ms
Discussion
3.

A 440 V, 50 HZ AC source supplies a series LCR circuit with a capacitor and a coil. If the coil has 100 mΩ resistance and 15 mH inductance, then at a resonance frequency of 50 Hz, the Q factor of the circuit is?

A. 82.63
B. 47.115
C. 27.38
D. 92.38
Answer» C. 27.38
Discussion
4.

A 440 V, 50 HZ AC source supplies a series LCR circuit with a capacitor and a coil. If the coil has 100 mΩ resistance and 15 mH inductance, then at a resonance frequency of 50 Hz, what is the value of the capacitor?

A. 676 μF
B. 575 μF
C. 591 μF
D. 610 μF
Answer» B. 575 μF
Discussion
5.

At what frequency will the current lead the voltage by 30° in a series circuit with R = 10Ω and C = 25 μF?

A. 11.4 kHz
B. 4.5 kHz
C. 1.1 kHz
D. 24.74 kHz
Answer» B. 4.5 kHz
Discussion
6.

A 440 V, 50 HZ AC source supplies a series LCR circuit with a capacitor and a coil. If the coil has 100 mΩ resistance and 15 mH inductance, then at a resonance frequency of 50 Hz, the half power frequencies of the circuit are?

A. 50.53 Hz, 49.57 Hz
B. 52.12 HZ, 49.8 Hz
C. 55.02 Hz, 48.95 Hz
D. 50 HZ, 49 Hz
Answer» B. 52.12 HZ, 49.8 Hz
Discussion
7.

Two series resonant filters are shown below. Let the 3 dB bandwidth of filter 1 be B1 and that of filter 2 be B2. The value of \(\frac{B_1}{B_2}\) is ____________

A. 0.25
B. 1
C. 0.5
D. 0.75
Answer» B. 1
Discussion
8.

Given, R = 10 Ω, L = 100 mH and C = 10 μF. Selectivity is?

A. 10
B. 1.2
C. 0.15
D. 0.1
Answer» E.
Discussion
9.

Given, R = 10 Ω, L = 100 mH and C = 10 μF. The values of ω0, ω1 and ω2 respectively are?

A. ω0 = 1000 rad/s, ω1 = 951.25 rad/s, ω2 = 1075.54 rad/s
B. ω0 = 1000 rad/s, ω1 = 975.25 rad/s, ω2 = 1051.25 rad/s
C. ω0 = 1000 rad/s, ω1 = 951.25 rad/s, ω2 = 1051.25 rad/s
D. ω0 = 1000 rad/s, ω1 = 825.30 rad/s, ω2 = 1075.54 rad/s
Answer» D. ω0 = 1000 rad/s, ω1 = 825.30 rad/s, ω2 = 1075.54 rad/s
Discussion
10.

A series RLC circuit has R = 50 Ω, L = 0.01 H and C = 0.04 × 10-6 F. System voltage is 100 V. At this frequency, the circuit impedance is?

A. 50 – j2.5 Ω
B. 50 – j2.8 Ω
C. 50 + j2.5 Ω
D. 50 + j2.8 Ω
Answer» B. 50 – j2.8 Ω
Discussion
11.

A series RLC circuit has R = 50 Ω, L = 0.01 H and C = 0.04 × 10-6 F. System voltage is 100 V. The frequency, at which the maximum voltage appears across the capacitor, is?

A. 5937.81 Hz
B. 7370 Hz
C. 7937.81 Hz
D. 981 Hz
Answer» D. 981 Hz
Discussion