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ZealScience
#2
May22-11, 05:44 AM
P: 346
First of all, welcome to PF, the world of physics.

Definately Ampere's law I think. I am not quite sure about this question.

Is A really the area of the hole? Because current in Ampere's Law is the current passing through the area attached to the close loop. But what is c in the answer? c=confusion???