In the figure, A constant current I flows in the long wire, in the direction shown. At the same time, the loop is being pulled to the right at constant speed v. a) Using Faraday's law of induction, calculate the magnitude of the net emf induced in the loop. b) Do this again, by looking at the emf induced in each segment of the loop due to its motion. c) Find the direction (clockwise or counterclockwise) of the current induced in the loop. (Use Lenz's law.) d) Do this again, using the magnetic force on charges in the loop. e) Check your answer for the emf in part (a) In the following special cases to see whether it is physically reasonable: (i) The loop is stationary; (ii) the loop is very thin, so a→0; (iii) the loop gets very far from the wire. a 10
In the figure, A constant current I flows in the long wire, in the direction shown. At the same time, the loop is being pulled to the right at constant speed v. a) Using Faraday's law of induction, calculate the magnitude of the net emf induced in the loop. b) Do this again, by looking at the emf induced in each segment of the loop due to its motion. c) Find the direction (clockwise or counterclockwise) of the current induced in the loop. (Use Lenz's law.) d) Do this again, using the magnetic force on charges in the loop. e) Check your answer for the emf in part (a) In the following special cases to see whether it is physically reasonable: (i) The loop is stationary; (ii) the loop is very thin, so a→0; (iii) the loop gets very far from the wire. a 10
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