A Bar Magnet Is Falling Through a Loop of Wire

question 36

Multiple Choice

A bar magnet is falling through a loop of wire with constant velocity. The north pole enters first. As the south pole leaves the loop of wire, the induced current (as viewed from above) will be:

• A) along the length of the magnet.
• B) zero.
• C) counterclockwise.
• D) clockwise.

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Definitions:

Variable Input

An input whose quantity can be changed in the short term by a firm to adjust the level of output.

Marginal Revenue Product

The additional revenue generated from employing one more unit of a factor of production, like labor or capital.

Marginal Cost

The cost implicated in the production of one more unit of a good or service.

Perfectly Competitive

A market structure characterized by many small firms, a homogeneous product, no barriers to entry or exit, and where no single firm can influence the market price.