@ Homework 203 A bar magnet is held stationary whle a ciecular loop of wire is m

Question

@ Homework 203 A bar magnet is held stationary whle a ciecular loop of wire is moved toward the magnet at constant velocity at position A as in the figure below. The loop passes over the magnet at position B and moves away from the magnet at position C. (For the following questions, state the directions as if you were to the right of the magnet, watching the loop of wire move away from you (a) Find the direction of the Induced current in the loop using Lena's law at position A O clockwise O No current is induced. (b) Find the direction of the induced current in the loop using Lenz's law at position c (c) what isthe induced current in the lop at poston (Poston , has the center of the lee exactly at the midpor, d the bar magnet) No current is induced MacBook Air 5

Explanation / Answer

At position A flux due to magnet is towards the south pole. As the ring moves towards south pole Flux density increases and hence according to Lenz's law current will induce such that it reduces the effect. hence looking from the given position current will induce in counter clockwise direction.

At position C Flux is decreasing in the direction of motion. Hence current induced will be in clockwise direction.

At B as it is at mid point for this instant and flux is homogeneous hence current induced will be zero.

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