If the rotational velocity of a dynamo armature is doubled, then the induced emf will
Text Solution
Verified by ExpertsThe correct answer is:
B
If 
is the area of the coil, there are 
tums in the coil, 
being the angular velocity of the armature, then the flux through each tum in time t is given by 
Using Faraday's Law, the emf induced in each tum of the coil is
The total induced emf in the coil
Now if we double 
will be doubled.
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