A bar magnet is falling toward the center of a loop of wire, with the north pole oriented downward. Viewed from the same side of the loop as the magnet, as the north pole approaches the loop, what is the direction of the induced current?
1.clockwise
2.zero
3.counterclockwise
4.along the length of the magnet
Question 2The figure below is a graph of the magnitude B versus time for a magnetic field that passes through a fixed loop and is oriented perpendicular to the plane of the loop. Rank the magnitudes of the emf generated in the loop at the three instants indicated from largest to smallest.
1. c > b > a
2. a > b > c
3. b > c > a
4. b > a > c
A simple motif, the β-α-β loop
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