MEDIUM
10th CBSE
IMPORTANT
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What is an electric motor?

Important Questions on Magnetic Effects of Electric Current

MEDIUM
10th CBSE
IMPORTANT
State the principle of an electric motor.
MEDIUM
10th CBSE
IMPORTANT
With the help of neat diagram describe how you can generate induced current in the circuit.
MEDIUM
10th CBSE
IMPORTANT
What is the difference between direct and alternating currents? Write one important advantage of using alternating current.
EASY
10th CBSE
IMPORTANT
Name and state the law which determines the direction of force experienced by a straight conductor carrying current in the magnetic field of a permanent magnet.
EASY
10th CBSE
IMPORTANT

In the statement of Fleming's left-hand rule, what do the following represent : 

(i) the direction of the forefinger.

(ii) the direction of the middle finger.

(iii) the direction of the thumb.

MEDIUM
10th CBSE
IMPORTANT
If number of coils of many turns are 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?
MEDIUM
10th CBSE
IMPORTANT
State four factors which determine the power of an electric motor.
MEDIUM
10th CBSE
IMPORTANT
A commutator is sometimes called split ring. Explain.