How does an Electric Motor work? (DC Motor)

The video tutorial explains the components and functioning of a basic DC motor. It covers the motor's protective casing, shaft, rotor, and the role of magnets in creating a magnetic field. The commutator and brushes are discussed in detail, highlighting their role in completing the circuit and enabling rotation. The video also addresses the impact of Eddy currents on motor efficiency and how laminated disks help reduce these currents. Finally, it explains the flow of electricity through the motor and the effects of arcing on the brushes.

What is the primary function of the shaft in a DC motor?

• To generate electrical energy

• To insulate the motor

• To transfer mechanical energy

• To control the speed of the motor

How do the brushes in a DC motor contribute to its operation?

• They reduce friction

• They complete the electrical circuit

• They provide insulation

• They generate the magnetic field

Why are multiple coils used in a DC motor rotor?

• To simplify the design

• To decrease the motor's speed

• To ensure smoother rotation

• To increase the motor's weight

What is the purpose of segmenting the rotor into insulated disks?

• To reduce the motor's weight

• To increase Eddy currents

• To decrease Eddy currents

• To simplify the motor's design

What happens when the brushes come into contact with two commutator plates?

• An arc is created

• The motor stops

• The motor speeds up

• The circuit breaks