A bar magnet is held stationary while a circular loop of wire is moved toward th

Question

A bar magnet is held stationary while a circular 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.) Find the direction of the induced current in the loop using Lenz's law at position A. clockwise counterclockwise No current is induced. Find the direction of the induced current in the loop using Lenz's law at position C. clockwise counterclockwise No current is induced. What is the induced current in the loop at position B? (Position B has the center of the loop exactly at the midpoint of the bar magnet.) clockwise counterclockwise No current is induced. Explain.

Explanation / Answer

a)anticlockwise

as the flux is increasing in direction of velocity current will be induced such that the flux does not increse in that direction .

b)clockwise

as flux is decreasing in direction of velocity so current will try to maintain it.

c)no current induced

as flux remains constant near the middle region

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