POWER FACTOR

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

Tags

NGSS.HS-PS2-5

Power factor can be mathematically expressed as:

• P/Q

• Q/P

• P/S

• S/P

The maximum value of power factor is:

• 0

• 0.3

• 0.95

• 1

The power factor of capacitive circuits is:

• Leading

• Lagging

• Both of these

• Any of these

A circuit having poor power factor will draw:

• No current

• Low current

• Normal current

• High current

The power factor of purely inductive circuits is:

• Leading

• Lagging

The useful power required for driving the motor or lighting the bulb is represented in:

• VAR

• Volt-Amperes

• Watts

Calculate the power factor in a circuit having true power 800 watts and apparent power 1000 watts:

• 0.85

• 0.8

• 1

• 0.6

Induction motors generally operate with _____ power factor:

• Lagging

• Leading

• Unity

• None of the above

In a circuit having leading power factor, current waveform leads the voltage waveform:

• True

• False