DC Motor Concepts

What is the primary function of a split ring commutator in a DC motor?

• To increase the motor's speed

• To reverse the direction of current flow in the armature

• To convert AC to DC

• To reduce the magnetic field interaction

How does the magnetic field influence the operation of a DC motor?

• It does not affect the motor

• It creates a force that causes the rotor to turn

• It reduces the electrical resistance of the motor

• It increases the output voltage of the motor

What is the role of current in generating torque in a DC motor?

• Current heats up the motor coils

• Current magnetizes the rotor

• Current interacts with the magnetic field to produce torque

• Current lubricates the motor components

What happens when the direction of current in a DC motor's armature is reversed?

• The motor stops

• The motor's speed doubles

• The rotational direction of the motor reverses

• The motor produces more heat

What is the effect of increasing the current in a DC motor's armature?

• Decreases torque

• Increases torque

• No effect on torque

• Decreases motor speed

Which component of a DC motor is primarily responsible for conducting electrical current to the motor's rotating armature?

• Bearings

• Brushes

• Shaft

• Casing

What is the primary purpose of the magnetic field in a DC motor?

• To provide structural support to the motor

• To cool down the motor

• To interact with the armature current to produce motion

• To insulate the motor components

In the context of DC motors, what does the term "armature" refer to?

• The outer casing of the motor

• The coils that generate magnetic field

• The rotating part of the motor

• The stationary part of the motor

What is the result of increasing the strength of the magnetic field in a DC motor?

• Decreases the torque

• Increases the torque

• No change in torque

• Decreases the current