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The graph represents the electromotive force (emf) generated in the dynamo coil, time for revolving, starting from normal position till (emf) becomes -50V for

 

The graph represents the electromotive force (emf) generated in the dynamo coil, time for revolving, starting from normal position till (emf) becomes -50V for the first time equals: (A) 50 msec (V) (B) 29.16 msec 100 (C) 11.6 msec 10 20 t (m.s) (D) 4.167 msec 100

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