A long solenoid with 20 turns per cm,has a small loop of area 4 cm sq. placed inside the solenoid normal to its axis.If the current carried by the solenoid changes steadily from 4A to 6A in 0.2 seconds,what is the (average)induced emf in the loop while the current is changing?

Asked by  | 7th Feb, 2012, 03:52: PM

Expert Answer:

n=20, A= 4 cm.sq., Ii= 4A, If = 6A, Delta I = 2A, Delta t= 0.2s
Flux linked with the loop is = BA = µo nIA =µnA dI/dt
Substituting the values, we get |?|=50. 24X10^n-5 V

Answered by  | 7th Feb, 2012, 10:54: PM

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