EASY
10th CBSE
IMPORTANT
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Fleming's Rule for the motor effect uses the hand.

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Important Questions on Magnetic Effect of Electric Current
EASY
10th CBSE
IMPORTANT
A current-carrying conductor is placed perpendicularly in a magnetic field. Name the rule which can be used to find the direction of force acting on the conductor.

EASY
10th CBSE
IMPORTANT
State two ways to increase the force on a current-carrying conductor in a magnetic field.

EASY
10th CBSE
IMPORTANT
Name one device whose working depends on the force exerted on a current-carrying coil placed in a magnetic field.

EASY
10th CBSE
IMPORTANT
State Fleming's left-hand rule. Explain it with the help of labelled diagrams.

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.
