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A simple electric doorbell probably uses ________ to ring the bell.

ggull329

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6 years ago

A simple electric doorbell probably uses ________ to ring the bell.

A simple electric doorbell probably uses ________ to ring the bell.

A) an electromagnet B) transistor
C) a DPDT switch D) a permanent magnet

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icysparkles

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ALECbob

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thanks

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