MEDIUM
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Commutator is a device that is used to _____ the direction of flow of current through a circuit.

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Important Questions on Electromagnetism

EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
Explain the function of the following parts of an electric motor.

Brushes 

EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
Explain the function of the following parts of an electric motor.

Armature

EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
Write the principle of working of an electric motor.
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
Explain the working of an electric motor.
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
Draw a neat labelled diagram of a d.c. motor.
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
State the basic principle of an electric motor. What is the function of a split ring in an electric motor?
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
Explain the function of the following parts of an electric motor.

Split ring

HARD
Science>Physics>Electromagnetism>Simple D.C. Motor

Explain the working of electric motor with a neat diagram.

EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
An electric device which converts electric energy into mechanical energy is called
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
An electric motor converts:
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
The principle of working of a motor is
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
State two ways to increase the speed of rotation of a DC motor.
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
If a single coil of large number of turns is used in a motor, it is found that the motion of the coil is not smooth but jerky.
Why is it so? How can this jerky motion be converted into a smooth circular motion?
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
State the energy changes in the case of a ceiling fan while in use.
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor

How can the power of an electric motor be increased? Explain with any three points.

MEDIUM
Science>Physics>Electromagnetism>Simple D.C. Motor
Draw the diagram of a simple electric motor. Label the following parts:

Brushes

MEDIUM
Science>Physics>Electromagnetism>Simple D.C. Motor
Draw the diagram of a simple electric motor. Label the following part:

Split rings

EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
What is electric motor?
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
Write any one use of a d.c. motor.
EASY
Science>Physics>Electromagnetism>Simple D.C. Motor
What is the role of the split ring in an electric motor?