The Mechanics of Electric Motors and Their Components

The video explains the working of an electric motor, which converts electrical energy into mechanical energy. It describes the components of the motor, including the coil, magnetic field, and split ring. The video details the flow of current through the coil and the application of Fleming's left hand rule to determine the direction of force on the coil's arms. It also explains the role of the commutator in reversing the current direction, allowing continuous rotation of the coil and axle.

What is the primary function of an electric motor?

• To store electrical energy

• To generate magnetic fields

• To convert electrical energy to mechanical energy

• To convert mechanical energy to electrical energy

Which component of an electric motor is responsible for holding the coil?

• Axle

• Brushes

• Split ring

• Magnetic field

How is the coil positioned in relation to the magnetic field in an electric motor?

• Perpendicular to the magnetic field

• At a 45-degree angle to the magnetic field

• At a 90-degree angle to the magnetic field

• Parallel to the magnetic field

What rule is applied to determine the direction of force on a current-carrying conductor in a magnetic field?

• Fleming's right-hand rule

• Ohm's law

• Fleming's left-hand rule

• Faraday's law

What happens to the coil when the current direction is reversed in an electric motor?

• The coil rotates in the opposite direction

• The coil stops rotating

• The coil rotates faster

• The coil continues to rotate in the same direction

What is the function of a commutator in an electric motor?

• To increase the speed of rotation

• To reverse the direction of current

• To decrease the resistance

• To generate electrical energy

Which part of the electric motor makes contact with the brushes to allow current flow?

• Axle

• Coil

• Split ring

• Magnetic field

What ensures the continuous rotation of the coil in an electric motor?

• Decrease in resistance

• Reversal of current at each half rotation

• Increase in voltage

• Constant magnetic field