Power factor

What is maximum value of power factor?

• 0.5

• 1

• 1.5

• 0.95

Active power and apparent power are respectively represented by?

• kW and kVAR

• kVAR and kVA

• kVA and kVAR

• kW and kVA

The primary reason for the low power factor is due to the installation of

• Induction motors

• DC motors

• Synchronous motors.

• Commutator motors.

Power factor is a ratio of:

• True power to apparent power

• Apparent power to true power

• Sum of real and reactive to apparent power

• Apparent power to (real – reactive) power

Power factor can be mathematically expressed as:

• P/Q

• Q/P

• P/S

• S/P

A circuit having poor power factor will draw:

• No current

• Low current

• Normal current

• High current

The power factor of ac circuit lies between

• 0 and 1

• -1 and 1

• 0 and -1

• None of the above

Low power factor has a drawback of

• Increased transmission and distribution losses

• Poor voltage regulation

• High cost of equipment for given load

• All of above

The power factor of an ac circuit is equal to:

• Cosine of the phase angle

• Sine of the phase angle

• Tangent of the phase angle

• Cotangent of the phase angle

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

• Power factor is unity

• Power factor is only 1%

• Power factor is too poor

• None of above