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The figure below displays a circular loop of metal wire in a uniform magnetic foeld pointing...


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The figure below displays a circular loop of metal wire in a uniform magnetic foeld pointing into the page. The radius of the loop is 15.0 cm and the magnitude of the field is 0.160 T. You grab points A and B and pull them in opposite directions, stretching the liop until its area is nearly zero, taking a time of 0.210 s to do so. What id the magnitude of the average of the average induced emf in the loop (in mV) during this time?
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Answer #1

The average induced emf can be written as, (considering only magnitude)

Vaa aug ava dt

Substituting values we get,

10-2 )2-0 0.21 πί 15 = 0.054 V Vavg = (0.16)

Hence the average induced emf is 0.054 V or 54 mV.

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