Lenz's Law Video Lessons

Concept

# Problem: The bar magnet is pushed toward the center of a wire loop. (View is 3D, slightly from above.) In which of the two situations is there (A) a clockwise induced current in the loop, (B) a counterclockwise induced current in the loop, or (C) no induced current in the loop?

###### FREE Expert Solution

In this problem, we're told that the bar magnet is pushed towards the center of the wire loop.

For easy reference, let's label our figures as:

According to Lenz's law, when a changing magnetic flux generates an emf, the polarity of the induced emf is such that it produces a current whose magnetic field opposes the changes that produced it.

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###### Problem Details

The bar magnet is pushed toward the center of a wire loop. (View is 3D, slightly from above.) In which of the two situations is there (A) a clockwise induced current in the loop, (B) a counterclockwise induced current in the loop, or (C) no induced current in the loop?