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Problem 31 Easy Difficulty

A square coil of wire of side 2.80 cm is placed in a uniform magnetic field of magnitude 1.25 T directed into the page as in Figure P20.31. The coil has 28.0 turns and a resistance of 0.780$\Omega .$ If the coil is rotated through an angle of $90.0^{\circ}$ about the horizontal axis shown in 0.335 s, find $(a)$ the magnitude of the average emf induced in the coil during this rotation and (b) the average current induced in the coil during this rotation.

Answer

a. 0.089 V
b. 0.105 \mathrm{\AA}

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Video Transcript

okay, so the enough induced is given by a number of turns. Times. The rate of change of flux is enough on so says number times, Magnetics, field times the tunes and area. Over a given time, eso 28 turns was coral and that its seals trains is one for him to five. Tesla, uh, area is ah, square, but side 2.8 centimeters. Areas 0.23 squares and this happens in 0.3 to 5 seconds. Giving you induced coma Sal's 0.9 volts or 89 Millie volts And part B is the fact that induced you're my physical. The current times resistant resistance homes law. So current is, uh, AMs over our So let's 0.89 volts over 78 homes. Thank you 105 and period for the current or one of five merely actors. And that's it.

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Top Physics 102 Electricity and Magnetism Educators
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