Please answer and show the solution for the given question?

Asked by AyushPix | 20th Nov, 2009, 08:44: PM

Expert Answer:

Average induced emf = -Change in magnetic flux/time.

change in magnetic flux = final flux - initial flux = BAcosθf - BAcosθi

The initial angle is 0, since the magnetic field and area point in the same direction, but the final angle is 180 since the area vector is flipped to other side.

change in magnetic flux = final flux - initial flux = BAcos180 - BAcos0 = -2BA

Average induced emf = -2BA/time

= 2B(0.02)2/0.20 = 20x10-3

B = 5 T.

Regards,

Team,

TopperLearning.

Answered by  | 20th Nov, 2009, 09:08: PM

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