Which of the following forces causes the hammer to move when it strikes the gong of an electric bell?

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Electrostatic force

Magnetic force

Gravitational force

Friction

answer is D.

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Detailed Solution

The magnet is activated, and the soft iron armature is strongly tugged when the electric circuit is complete. The sound is produced by the hammer striking the gong. Therefore, the movement of the hammer is caused by the magnetic force.

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