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## Homework Statement

A circular conducting coil of radius 2.8 cm is placed in a uniform magnetic field of .900 T with the plane of the coil perpendicular to magnetic field. Coil rotated 180 degrees about the axis in .222 seconds. If the coil is made of copper with a diameter of .900 mm, what is the average current that flows through the coil during the rotation?

## Homework Equations

V = IR R = pL/A

## The Attempt at a Solution

I correctly figured out the induced voltage of .02 V.

V = IpL/A

p of copper = 1.68e-7

L = 2pi*r A = pi*r squared so L/A = 2pi*r/pi*r sq. = 2/r

.02 V = I (1.68e-7)(2/.45e-3)

I = .00267e4

The answer per the webassign is 4.32 A. HELP!