Motor Parts

Label each of the parts of the motor.

a

b

c

d

e

f

Commutator

Brush

Magnetic Wire

Magnet

Shaft

Power Source Connection

Armature

Stator

What is the purpose of the commutator in a motor?

• To reduce energy consumption in the motor.
• To provide mechanical support to the rotor.
• To reverse the direction of current in the motor windings.
• To increase the speed of the motor.

What is the stator?

• The stator is the stationary component of an electric motor or generator.
• The stator is the rotating part of an electric motor.
• The stator is a type of battery used in electric vehicles.
• The stator is the component that generates electricity in a solar panel.

In a motor, an armature

• The armature is the rotating part of a motor.
• The armature is responsible for cooling the motor.
• The armature is the stationary part of a motor.
• The armature generates electrical energy in a motor.

What is an electric motor used for?

• Converting electrical energy into mechanical energy

• Generating electric currents

• Converting mechanical energy into electrical energy

• Measuring electrical resistance

A toy train is driven around a track by an electric motor.

How can the speed of the motor be increased?

• Use a motor made with fewer turns of wire.

• Use a smaller d.c. voltage.

• Use a stronger magnet in the motor.

• Use the supply with its connections reversed.

When the motor is connected to a battery, the loop rotates. When the motor is disconnected, the loop stops rotating. Which of these statements best explains why the loop only turns when the motor is connected to the battery?A motor is created when a copper loop is placed between two permanent magnets as shown in the diagram below.

• The battery moves electrons in the permanent magnets to build an electric field.
• The battery causes the loop to conduct electricity through the magnets.
• The battery moves electrical charges through the loop creating a magnetic field.
• The battery pushes protons through the commutator, causing magnetism.