Current produced by varying magnetic flux

  • Thread starter Tosh5457
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  • #1
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I'm translating the problem, so sorry for the errors.

Homework Statement


Radius of the upper circumference = 5cm
Radius of the lower circumference = 9cm
Resistance/meter = 3.00 ohm/meter
B is the magnetic field: DB/dt = 2.00 T/s

What's the magnitude of the current, and where does the current points to?

Homework Equations



EMF = [itex]-N \ \frac{\Delta \Phi_B}{\Delta t} \ \ \mbox{or} \ \ -N \ \frac{d\Phi_B }{dt}[/itex]
V = RI

The Attempt at a Solution

 

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Answers and Replies

  • #2
Well, find the magnetic flux from the external field; the current should be produced in order to oppose an change in magnetic flux.
 

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