EMJ43003 AC MOTOR

Which part of an induction motor is responsible for producing the rotating magnetic field?

• ROTOR

• STATOR

• SHAFT

• COMMUTATOR

What is the main fucntion of the rotor in an induction motor?

• To supply electrical power

• To create a magnetic field

• To rotate and deliver mechanical output

• To control speed

Which type of current is supplied to the stator of a three-phase induction motor?

• 
• 
• 
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What is the phenomenon called when the rotor speed is less than the synchronous speed?

• SLIP

• SKEW

• LAG

• HOLDING

Which loss is primarily responsible for heating in the core of an AC motor?

• Copper loss

• Iron loss

• Friction loss

• Windage loss

What is the typical range of slip in a normal running induction motor?

• 0–1%

• 2–8%

• 10–20%

• 20–30%

What is the main difference between a synchronous and an induction motor?

• Synchronous motors require slip to operate

• Induction motors run at synchronous speed

• Synchronous motors run at synchronous speed

• Induction motors use DC supply

Which component is NOT present in a squirrel cage induction motor?

• Stator

• Rotor

• Brushes

• Shaft

What is the effect of increasing the load on an induction motor?

• Decreases slip

• Increases slip

• No effect on slip

• Stops the motor

What is the main reason for skewing the rotor bars in a squirrel cage induction motor?

• To increase speed

• To reduce noise and vibration

• To increase torque

• To reduce losses