Which description best describes an electromagnet?

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Multiple Choice

Which description best describes an electromagnet?

Explanation:
An electromagnet generates its magnetic field from electric current flowing through a coil around a magnetic core. The key idea is that the field strength is adjustable: increase the current or add more turns to strengthen the field, or reduce current to weaken it. The field exists only while current is flowing, so it is not persistent once the current is removed. This contrasts with a permanent magnet, which relies on remanent magnetization to stay magnetic after any external influence is gone.

An electromagnet generates its magnetic field from electric current flowing through a coil around a magnetic core. The key idea is that the field strength is adjustable: increase the current or add more turns to strengthen the field, or reduce current to weaken it. The field exists only while current is flowing, so it is not persistent once the current is removed. This contrasts with a permanent magnet, which relies on remanent magnetization to stay magnetic after any external influence is gone.

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