Which instrument is not used to convert electric energy into heat energy?

Room heater

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Electric Iron

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Electric Bell

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Electric water heater

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Solution

The correct option is A Electric Bell
Electric Bell is not used to convert electric energy into heat energy as there is no use of heat in functioning of an electric bell.In electric bell electrical energy is used to convert sound energy.First it converts electric energy into mechanical energy and which is used to produce sound energy.
Therefore,C is correct option.

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