Q.

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

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a

(a) and (d)

b

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

c

Only (a)

d

(a) and (b)

answer is C.

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Detailed Solution

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

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