Explore topic-wise MCQs in Electrical Engineering.

This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

In ac circuit, resistance 5 ohm is connected with a capacitor having capacitive reactance 12 ohm. Supply of 260 V is connected to the circuit. Calculate the voltage across a capacitor.

A. 300 V
B. 200 V
C. 240 V
D. 100 V
Answer» D. 100 V
Discussion
2.

In ac circuit, resistance 5 ohm is connected with capacitor having capacitive reactance 12 ohm. Supply of 260 V is connected to the circuit. Calculate the voltage across resistance.

A. 300 V
B. 200 V
C. 240 V
D. 100 V
Answer» E.
Discussion
3.

In ac circuit, resistance 5 ohm is connected with capacitor having capacitive reactance 12 ohm. Supply of 260 V is connected to the circuit. Calculate the current in the circuit.

A. 40 A
B. 10 A
C. 20 A
D. 30 A
Answer» D. 30 A
Discussion
4.

If in an alternating current circuit, capacitance C is connected to a supply of 200V,50Hz. Current in the circuit is 1.89 A. Find the capacitance C.

A. 30 µF
B. 20 µF
C. 10 µF
D. 15 µF
Answer» B. 20 µF
Discussion
5.

If in an alternating current circuit, capacitance of 30 µF is connected to a supply of 200V,50Hz. Find the current in the circuit.

A. 1.38 A
B. 1.89 A
C. 1.74 A
D. 0.89 A
Answer» B. 1.89 A
Discussion
6.

If in an alternating current circuit, impedance is 26 ohm, capacitive reactance is 24 ohm, what is the resistance?

A. 25 ohm
B. 10 ohm
C. 12 ohm
D. 23 ohm
Answer» C. 12 ohm
Discussion
7.

If in an alternating current circuit, resistance is 5 ohm, capacitive reactance is 12 ohm, what is the impedance?

A. 5 ohm
B. 10 ohm
C. 12 ohm
D. 13 ohm
Answer» E.
Discussion
8.

At DC, inductor acts as ___________

A. Open circuit
B. Short circuit
C. Resistor
D. Inductor
Answer» C. Resistor
Discussion
9.

The expression for current in an RC circuit is?

A. i=(V/R)e<sup>(t/RC)</sup>
B. i=(V/R)e<sup>(-t/RC)</sup>
C. i=(V/R)/e<sup>(t/RC)</sup>
D. i=(V/R)/e<sup>(-t/RC)</sup>
Answer» C. i=(V/R)/e<sup>(t/RC)</sup>
Discussion
10.

At DC, the capacitor acts as?

A. Open circuit
B. Short circuit
C. Resistor
D. Inductor
Answer» B. Short circuit
Discussion
11.

An RC network is one which consists of?

A. Resistor and capacitor in parallel
B. Resistor and capacitor in series
C. Resistor and inductor in parallel
D. Resistor and inductor in series
Answer» C. Resistor and inductor in parallel
Discussion
12.

For an RC circuit, the phase angle is always ________

A. Positive
B. Negative
C. 0
D. 90
Answer» B. Negative
Discussion
13.

Which, among the following is the correct expression for φ?$

A. φ=tan<sup>-1</sup>(Xc/R)
B. φ=tan<sup>-1</sup> (R/Xc)
C. φ=tan<sup>-1</sup> (Xc*R)
D. φ=cos<sup>-1</sup> (Xc/R)
Answer» B. ‚âà√¨‚àö√∫=tan<sup>-1</sup> (R/Xc)
Discussion
14.

In an RC series circuit ________

A. Applied voltage lags capacitor voltage
B. Applied voltage leads capacitor voltage
C. Current and voltage are in phase
D. Applied voltage and capacitive voltage are in phase
Answer» C. Current and voltage are in phase
Discussion