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The electromagnet in a galvanometer

Aincreases the voltage in a circuit.
Bmoves a pointer along a numbered scale in response to a current.
Cinduces an electric current.
Dincreases the current in a circuit.

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Greenleafable

The correct answer is B. moves a pointer along a numbered scale in response to a current.

The galvanometer is a device used for measuring small and weak electric currents. It has a part that is the electromagnet and that moves a pointer when a current is introduced. It measures smaller currents than a regular ammeter.

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