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December 9th, 2009, 06:38 AM   #1
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Induced emf problem

A large cylindrical loop of 288 turns and radius 67.0 cm carries a current of 70.0 A. A small square loop of 36 turns and 1.00 cm on a side is placed at the center of the large loop. If the current in the large loop drops to 0 in 0.0470 s, find the induced emf in the small loop. (Assume that the magnetic field in the region of the square loop is uniform.)
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June 8th, 2010, 09:51 AM   #2
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Re: Induced emf problem

N(magnetic flux) = N(BA) where B is the magnetic strength, N is the number of turns and A is the Area

B (magnetic strength) = (I)/2?R where is the permitivity of free space, I is the current and R is the radius from the center of the wire.

A=Qt where Q is the charge and t is the time

Can you move on from here.

Also, by lenz's law, the current induced in a wire tends to oppose normal direction when flux changes or the magnetic strength changes
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June 10th, 2010, 05:18 AM   #3
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Re: Induced emf problem

Lets take a step back

Can you move on from here?

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