Discovering DC Motors

What is a part of a DC motor that helps it spin?

• Bearing

• Commutator

• Stator

• Rotor

What do we call the main part that turns in a DC motor?

• commutator

• stator

• rotor

• armature

How does a DC motor get its power?

• A DC motor gets its power from an alternating current (AC) supply.

• A DC motor gets its power from a direct current (DC) electrical supply.

• A DC motor gets its power from a mechanical source like a wind turbine.

• A DC motor gets its power from a battery that uses solar energy.

What type of DC motor can change speed easily?

• AC motor

• DC shunt motor

• DC series motor

• Stepper motor

What is a common use for DC motors in toys?

• To charge batteries in toys.

• To power lights in toys.

• To control sound effects in toys.

• To provide movement in toys.

What is one advantage of using a DC motor?

• High starting torque

• Low efficiency at high speeds

• Higher maintenance costs

• Limited control over speed

What type of DC motor is used for high torque?

• Shunt-wound DC motor

• Stepper motor

• Permanent magnet DC motor

• Series-wound DC motor

What part of the DC motor helps to create a magnetic field?

• Field windings or permanent magnets

• Rotor

• Stator

• Commutator

What do we call the device that controls the speed of a DC motor?

• DC motor inverter

• DC motor regulator

• DC motor controller

• DC motor driver

Why are DC motors popular in small machines?

• DC motors are too large for small machines.

• DC motors are less efficient than AC motors.

• DC motors require complex control systems.

• DC motors are favored in small machines for their simplicity, compactness, and ease of control.