Day 13 DC Motor(Generation)

Which part of the DC motor converts electrical energy into mechanical energy?

• Field assembly

• Armature assembly

• Brush assembly

• Commutator

Tags

NGSS.HS-PS3-3

The rotating part of the motor containing copper windings and a commutator is called the:

• End frame

• Field assembly

• Armature assembly

• Starter generator

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What is the purpose of the commutator in a DC motor?

• Generate electricity

• Reduce noise

• Reverse current direction in the armature

• Increase speed

Tags

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NGSS.HS-PS3-5

A voltage that opposes the applied voltage and increases with motor speed is known as:

• Torque

• Electromagnetism

• Counter Electromotive Force (EMF)

• Resistance

Which type of brush is rectangular and suited for larger motors?

• Tube type

• Box type

• Graphite type

• Parallel type

Field coils in a DC motor are responsible for:

• Generating current

• Cooling the motor

• Creating a magnetic field

• Lubricating moving parts

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

The brush assembly is made of:

• Aluminum fins

• Steel wires

• Graphite carbon blocks

• Plastic brackets

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Which term describes the force that causes rotation in a motor?

• Resistance

• Torque

• Voltage

Laminated iron cores are used in motors to:

• Increase friction

• Prevent overheating and energy loss

• Reduce speed

• Support the brush assembly

Tags

NGSS.HS-PS2-5

Torque

• Prevents current reversal

• Causes the motor's coil to rotate

• Maintains electrical insulation

• Increases resistance in the field coil