If a Bar Magnet Is Falling Through a Loop of Wire

question 64

Multiple Choice

If a bar magnet is falling through a loop of wire, the induced current in the loop of wire sets up a field which exerts a force on the magnet. This force between the magnet and the loop will be repulsive when:

• A) the magnet enters the loop.
• B) the magnet is leaving the loop.
• C) never.
• D) the magnet is halfway through.

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