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Answer to Question #19947 in Electromagnetism for Fisicfun

Question #19947

I was just wondering if someone could work this problem out for me. Here is my link:

How can I know how far the coil has travelled and hence work out the change of flux, then voltage and current? I was wondering if the induced emf will be less becasue the coil is half way out of the magnetic field? Perhaps half the emf? I am just not sure about this.

Also I was wondering if anyone could tell me which of P=VI or P=I2R I should use for finding the work done?

Any help at all on this problem would be much appreciated!
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