Question

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a doorbell circuit converts electrical energy into mechanical energy. the mechanical energy is in the form of vibrations that ultimately produce
chemical energy
thermal energy
radiant energy
sound energy

Explanation:

An doorbell circuit converts electrical energy to mechanical (vibrational) energy, which produces sound. Chemical energy is from reactions, thermal from heat, radiant from light—none match. Sound energy results from vibrations (mechanical energy conversion here).

Answer:

sound energy