First slide

A.C. Generator

Question

The variation of EMF with time for four types of generators are shown in the figures. Which amongst them can be called AC?

Moderate

A

Only (a)
B

(a) and (d)
C

(a), (b), (c), (d)
D

(a) and (b)

Solution

A current which changes its direction periodically is called alternating current. Hence given all options are AC.

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