Class 12

25. Alternating Current question bank (Physics)

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Q1.

A small loop lies outside a circuit. The key of the circuit is closed and opened alternately. The closed loop will show  

(A)
Clockwise pulse followed by another clockwise pulse
(B)
Anticlockwise pulse followed by another anticlockwise pulse
(C)
Anticlockwise pulse followed by a clockwise pulse
(D)
Clockwise pulse followed by an anticlockwise pulse
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Q2.

In an ac dynamo, the number of turns in the armature are made four times and the angular velocity 9 times, then the peak value of induced emf will become  

(A)
36 times
(B)
12 times
(C)
6 times
(D)
18 times
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