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Question 29.49

# Question 29.49 - In the figure shown the loop is being...

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In the figure shown the loop is being pulled to the right at a constant speed v . A constant current I flows in the long wire, in the direction shown. a ) Calculate the magnitude of the net emf ε induced in the loop . Do this two ways: ( i ) using Faraday’s law of induction and ( ii ) by looking at the emf induced in each segment of the loop due to its motion. b ) Find the direction clockwise or counterclockwise of the current induced in the loop. Do this two ways: using Lenz Law, using the magnetic force acting on the charges in the loop

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First of all note current I produces a magnetic B field in circular loops the penetrate the wire loop. Note that the area remains constant but the B field changes because the loop is moving away from the wire. Because the B field is smaller further from the wire, this means the flux changes (gets smaller) since Φ B = B ∙ A and B is getting smaller in time . Hence by Faraday’s law an emf is produced and given by: Calculate the magnitude of the net emf ε induced in the loop .
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Question 29.49 - In the figure shown the loop is being...

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