# Top 10 MCQs on Power Factor

The power factor is a ratio of real power and apparent power. Given below are top 10 MCQs on Power Factor.

1. Power factor can be mathematically expressed as:

1. PF = P/S
2. PF = S/P
3. PF = P + S
4. PF = P – S

Power factor is a ratio of real power to apparent power

2. The power factor of an inductive circuit has:

2. Lagging
3. Unity
4. Any of above

A purely inductive circuit has Lagging power factor

3. The power factor of purely resistive circuit is:

2. Lagging
3. Unity
4. Any of above

The power factor of a purely resistive circuit is unity

4. The power factor of a capacitive load is:

2. Lagging
3. Unity
4. Any of above

5. A load having poor power factor draws current:

1. Negligible
2. Not negligible but small
3. Normal
4. High

1. Resistive
2. Capacitive
3. Inductive
4. Resistive + Inductive

Correct answer: 4. Resistive + Inductive

7. Usually, the engineers achieve PF correction using:

1. Capacitors
2. Inductors
3. Resistors
4. All of above

8. Power factor can be numerically measured as:

1. A number
2. Percentage
3. Both of these
4. None of these

Correct answer: 3. Both of these

9. If power factor is expressed as a number, the digit 1 indicates:

1. Power factor is unity
2. Power factor is only 1%
3. Power factor is too poor
4. None of above