AC Induction Motors and Power Factor

What is the primary function of an AC induction motor?

• To convert AC to DC

• To convert electrical energy into mechanical energy

• To step up voltage

• To store electrical energy

What is the main component of the rotor in an AC induction motor?

• Copper windings

• Aluminum windings

• Laminated iron core

• Permanent magnets

What is the purpose of the stator in an AC induction motor?

• To rotate the rotor

• To generate a magnetic field

• To store electrical energy

• To convert mechanical energy into electrical energy

What type of current is supplied to the stator of an AC induction motor?

• Direct current (DC)

• Alternating current (AC)

• Pulsating DC

• None of the above

What is slip in an AC induction motor?

• The difference between the synchronous speed and the rotor speed

• The speed at which the rotor rotates

• The speed at which the stator rotates

• The difference between the input and output power

What is power factor?

• The ratio of real power to apparent power

• The ratio of apparent power to real power

• The ratio of reactive power to real power

• The ratio of real power to reactive power

What is the typical range of power factor for industrial loads?

• 0.1 to 0.3

• 0.4 to 0.6

• 0.7 to 0.9

• 0.95 to 1.0

What is the effect of a low power factor on an electrical system?

• Increased efficiency

• Reduced voltage drop

• Increased losses and reduced efficiency

• Improved power quality

Which device is commonly used for power factor correction?

• Resistor

• Inductor

• Capacitor

• Transformer

What is the main benefit of power factor correction?

• Increased power consumption

• Reduced energy losses

• Increased voltage drop

• Decreased efficiency