State the energy changes in the following while in use:
(a) An electric bulb
(b) An electric oven
(c) A loud speaker
(d) A microphone
(e) An electric motor

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Solution

An electric bulb — Electrical to light energy

An electric oven — Electrical to heat energy

A loud speaker — Electrical to sound energy

A microphone — Electrical to sound energy

An electric motor — Electrical to mechanical energy

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