This set of Basic Electrical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Mechanical Analogy of an Inductive Circuit”.

1. What is the value of current in an inductive circuit when there is no applied voltage?

a) Minimum

c) Maximum

c) Zero

d) Cannot be determined

View Answer

Explanation: The current in an inductive circuit is maximum when there is no voltage applied because the coils of the inductor store electric flux.

2. What is the current in an inductive circuit when the applied voltage is maximum?

a) Infinity

c) Maximum

c) Zero

d) Cannot be determined

View Answer

Explanation:The current in an inductive circuit is zero or minimum when the value of the applied voltage is maximum.

3. In an inductive circuit, the voltage_______ the current?

a) Leads

b) Lags

c) Is greater than

d) Is less then

View Answer

Explanation: In a pure inductive circuit the voltage leads the current and the current lags the voltage by a phase difference of 90 degrees.

4. In an inductive circuit, the current________ the voltage?

a) Leads

b) Lags

c) Is greater than

d) Is less then

View Answer

Explanation: In a pure inductive circuit the voltage leads the current and the current lags the voltage by a phase difference of 90 degrees.

5. Inductor does not allow sudden changes in?

a) Voltage

b) Current

c) Resistance

d) Inductance

View Answer

Explanation: The inductor does not allow sudden changes in current because if current changes in the inductor occurs in zero time, the voltage becomes zero which is not possible.

6. In case of Inductive circuit, Frequency is ______________ to the current.

a) Directly proportional

b) Inversely proportional

c) Unrelated

d) Much greater than

View Answer

Explanation: Inductance is inversely proportional to current since, as the inductance increases, current decreases.

7. In a pure inductive circuit, the power factor is?

a) Maximum

b) Minimum

c) 0

d) Infinity

View Answer

Explanation: In a pure inductive circuit, current is lagging by 90 degrees from the voltage. The power factor is the cosine of the angle in between the voltage and the current. If the angle between the voltage and current is 90, then cos90=0. Hence, the power factor is zero.

8. What is the power in a pure inductive circuit?

a) Maximum

b) Minimum

c) 0

d) Infinity

View Answer

Explanation: The power in a pure inductive circuit is zero because the phase angle is zero, due to which the power factor is zero and hence the power is zero.

9. What is the unit for inductive reactance?

a) Henry

b) Ohm

c) Farad

d) Volts

View Answer

Explanation: Inductive reactance is nothing but the impedance. Impedance is the AC equivalent of resistance, hence the unit for inductive reactance is ohm.

10. If the current in a coil having a constant inductance of L henrys grows at a uniform rate, what is the value of the average current?

a) I

b) I/2

c) I/4

d) 0

View Answer

Explanation: The average current is the average of the current which flows in the inductor. Hence it is I/2.

**Sanfoundry Global Education & Learning Series – Basic Electrical Engineering.**

To practice all areas of Basic Electrical Engineering, __here is complete set of 1000+ Multiple Choice Questions and Answers__.