Monday
April 21, 2014

Homework Help: Physics

Posted by Alyssa on Sunday, February 17, 2013 at 8:38pm.

A circular conducting coil with radius 3.40 cm is placed in a uniform magnetic field of 1.090 T with the plane of the coil perpendicular to the magnetic field. The coil is rotated 180 about the axis in 0.222 s.

(a) What is the average induced emf in the coil during this rotation?

I got 35.7mV and I am almost positive this is right.

(b) If the coil is made of copper with a diameter of 0.900 mm, what is the average current that flows through the coil during the rotation?

I used I=V/R and R=pL/A (where p is resistivity of copper 1.67e-8) and got I 481A but this is not right. Please help!

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