In an electric bell, it is the ____ that strikes the gong.

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Detailed Solution

In an electric bell, it is the hammer that strikes the gong.
The magnetic effect of current drives the operation of an electromagnet. In an electric bell, the circuit is completed when the key is pressed, and current flows through it, magnetising the electromagnet and attracting the armature. The armature's movement causes the hammer to strike the gong. The sound is produced by frequently and rapidly striking the hammer with the gong.

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