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Question: In an ac dynamo, the number of turns in the armature are made four times and the angular velocity 9 ...

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

Answer

36 times

Explanation

Solution

e=e0sin⁡ωte = e_{0}\sin\omega t where e0 = ωNBA

e0′=(9ω)(4N)BA=36e0e_{0}^{'} = (9\omega)(4N)BA = 36e_{0}