Weekly Assessment- 4 (HW/MR)

WHAT IS TORQUE?

• TWISTING FORCE

• KINETIC FORCE

• MAGNETIC FORCE

WHAT IS BACK EMF?

• THE VOLTAGE OPPOSES THE SUPPLY VOLTAGE

• THE VOLTAGE DOES NOT OPPOSE THE SUPPLY VOLTAGE

• SUPPLY VOLTAGE

• INDUCED VOLTAGE

GENERATOR CONVERTS ------ ENERGY INTO ----- ENERGY

• MECHANICAL, ELECTRICAL

• ELECTRICAL, MECHANICAL

• POTENTIAL,KINETIC

• MECHANICAL, MECHANICAL

The part of an electric motor that doesn't spin is called the...

• armature

• commutator

• stator

• bearings

In the image shown, the dark grey shapes are called:

• Brushes

• Armatures

• Commutators

• Windings

What is formed when a wire in an electric circuit is wrapped around an iron core producing a magnetic field?

• electromagnet

• generator

• magnet

• electric motor

The flow of electric charge in a circuit is called _______.

• Heat

• Sound

• Electric Current

• Magnetic

In a synchronous motor, the rotor rotates at the same speed as the:

• Frequency of the power supply

• Stator

• Commutator

• Armature

A motor that operates both on AC and DC power sources is known as a:

• DC motor

• AC motor

• Universal motor

• Synchronous motor

13. The speed of an induction motor is primarily determined by the:

• Number of poles

• Ambient temperature

• Rotor material

• Voltage supply