How does an Electric Motor work? DC Motor explained

The video tutorial explains the basics of DC motors, including their components and operation. It covers the fundamentals of electricity, magnetic fields, and electromagnetism, and how these principles apply to DC motors. The tutorial also demonstrates the use of Fleming's left hand rule to determine the direction of force in a motor. Finally, it provides a detailed look at the operation of a DC motor, highlighting the flow of current and the resulting forces that cause rotation.

What is the primary function of a DC motor?

• To convert electrical energy into mechanical energy

• To convert mechanical energy into electrical energy

• To regulate electrical current

• To store electrical energy

Which component of a DC motor is responsible for transferring mechanical energy?

• Rotor

• Stator

• Commutator

• Shaft

What is the role of voltage in an electrical circuit?

• To stop the flow of electrons

• To create a magnetic field

• To force electrons to move

• To decrease resistance

In which direction does conventional current flow?

• It does not flow

• In any random direction

• From positive to negative

• From negative to positive

What happens when two magnets with like poles are placed near each other?

• They repel each other

• They attract each other

• They create a new magnetic field

• They have no effect on each other

Why are the rotor disks in a DC motor laminated?

• To improve magnetic field strength

• To enhance conductivity

• To reduce eddy currents

• To increase the weight

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

• To provide mechanical support

• To insulate the commutator

• To deliver electricity to the commutator

• To cool the motor

According to Fleming's left-hand rule, what does the thumb represent?

• Direction of current

• Direction of force

• Direction of magnetic field

• Direction of electron flow

What effect does reversing the power supply have on a DC motor?

• It decreases the speed

• It increases the speed

• It reverses the direction of rotation

• It stops the motor

What is the result of combining upward and downward forces in a coil?

• The coil contracts

• The coil remains stationary

• The coil expands

• The coil rotates