A Circular Coil of Copper Wire Is Lying Flat on a Horizontal

question 93

Multiple Choice

A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held with its south pole downward, vertically above the center of the coil. The magnet is kept stationary with respect to the coil. As viewed from above, you can say that the magnet induces

• A) counterclockwise current in the loop.
• B) clockwise current in the loop.
• C) no current in the loop.
• D) an emf but no electric current in the loop.
• E) Not enough information is provided.

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Definitions:

Warm Front

The sloping boundary between an advancing warm air mass and a cooler air mass.

Gulf Stream

A powerful, warm ocean current that flows from the Gulf of Mexico along the eastern coast of the United States and across the Atlantic Ocean.

Supercell Thunderstorms

Highly organized and severe thunderstorms characterized by a deep, persistently rotating updraft, capable of producing damaging winds, large hail, and tornadoes.

Central Updraft

The upward movement of warm air within the center of a storm system, crucial for the development and maintenance of thunderstorms.