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

36 times

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12 times

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6 times

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18 times

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Solution

The correct option is A
36 times

$e = e_{0} s i n W t w h e r e e_{0} = N B A W$

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\frac{6^{- 4} \times 12^{3} \times 36}{3^{- 5} \times 18^{2}} = m

m =

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