Power Factor MCQ [PF & PF Correction Multiple Choice Questions]

The power factor is the ratio of reak to apparent power. Power factor can be measured either in the form of a percentage (0-100%) or by a number (0-1)

Where 1 or 100% indicates the maximum power factor. The higher the power factor is, the more economical and beneficial the system is.

MCQ on Power Factor

Power factor can be mathematically expressed as:

  1. P/Q
  2. Q/P
  3. P/S
  4. S/P

Correct answer: 1. P/Q


The power factor angle of a purely inductive circuit is:

  1. 45 degree
  2. 60 degree
  3. 75 degrees
  4. 90 degree

Correct answer: 4. 90 degrees


In a load comprising of resistance and inductance:

  1. Load current lags voltage
  2. Load voltage lags current
  3. Both are in phase
  4. Any of above

Correct answer: 1. Load current lags voltage


The power factor of capacitive circuits is:

  1. Leading
  2. Lagging
  3. Both of these
  4. Any of these

Correct answer: 1. Leading


A circuit having poor power factor will draw:

  1. No current
  2. Low current
  3. Normal current
  4. High current

Correct answer: 4. High current


The power factor of purely inductive circuits is:

  1. Leading
  2. Lagging
  3. Both of these
  4. Any of these

Correct answer: 2. Lagging


A 500 kVA circuit drawing 200 kW and an inductive load requires how much capacitance to obtain unity power factor:

  1. 100
  2. 200
  3. 300
  4. 400

Correct answer: 3. 300

1 Comment

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  1. Harshini Harshini

    Thanks for this Mcqs

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