EASY
10th CBSE
IMPORTANT
Earn 100
State Fleming's left-hand rule. Explain it with the help of labelled diagrams.
Important Questions on Magnetic Effect of Electric Current
EASY
10th CBSE
IMPORTANT
What is the principle of an electric motor? Name some of the devices in which electric motors are used.
HARD
10th CBSE
IMPORTANT
In a d.c. motor, why must the current to the coil be reversed twice during each rotation?
EASY
10th CBSE
IMPORTANT
What device reverses the current?
EASY
10th CBSE
IMPORTANT
State what would happen to the direction of rotation of a motor if the current were reversed.
EASY
10th CBSE
IMPORTANT
State what would happen to the direction of rotation of a motor if the magnetic field were reversed.
MEDIUM
10th CBSE
IMPORTANT
State what would happen to the direction of rotation of a motor if both current and magnetic field were reversed simultaneously.
EASY
10th CBSE
IMPORTANT
In what ways can a motor be made more powerful?
EASY
10th CBSE
IMPORTANT
What is an electric motor? With the help of a labelled diagram, describe the working of a simple electric motor.
