Homework Help: Physics

Posted by J on Monday, March 3, 2008 at 6:47pm.

A coil of wire with 200 circular turns of radius of 3 cm is in a uniform magnetic field along the axis of the coil. the coil has R=40 ohms. At what rate, in Teslas per second, must the magnetic field be changing to induce a current of .150 A in the coil?

I don't know if I am using the wrong equation or what, but I can't get the right answer for this one

Physics - drwls, Monday, March 3, 2008 at 6:51pm
V = A N dB/dt

N is the number of turns and A is the coil area.
V = I R = 6 Volts

Solve for the rate of change of B, dB/dt

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