Explore topic-wise MCQs in Network Theory.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.

1.

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

A. 4.089 10<sup>4</sup> Hz
B. ( frac{11111.1}{ } )Hz
C. 4.089 10<sup>4</sup> Hz
D. ( frac{1}{ } ) 10<sup>4</sup> Hz
Answer» C. 4.089 10<sup>4</sup> Hz
Discussion
2.

A series RLC circuit has a resonance frequency of 1 kHz and a quality factor Q = 50. If R and L are doubled and C is kept same, the new Q of the circuit is?

A. 25.52
B. 35.35
C. 45.45
D. 20.02
Answer» C. 45.45
Discussion
3.

A circuit with a resistor, inductor and capacitor in series is resonant with frequency f Hz. If all the component values are now doubled, then the new resonant frequency will be?

A. 2 f
B. f
C. ( frac{f}{4} )
D. ( frac{f}{2} )
Answer» E.
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 m 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
5.

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

A. 676 F
B. 575 F
C. 591 F
D. 610 F
Answer» B. 575 F
Discussion
6.

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

A. 11.4 kHz
B. 4.5 kHz
C. 1.1 kHz
D. 24.74 kHz
Answer» B. 4.5 kHz
Discussion
7.

A 440 V, 50 HZ AC source supplies a series LCR circuit with a capacitor and a coil. If the coil has 100 m 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
8.

A series RLC circuit has R = 50 , 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
B. 50 j2.8
C. 50 + j2.5
D. 50 + j2.8
Answer» B. 50 j2.8
Discussion
9.

A series RLC circuit has R = 50 , 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