The heating effect of electric current is used in

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An electric bulb

An electric toaster

A room heater

All of these

answer is D.

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Detailed Solution

The heating effect of electric current is used in an electric bulb, an electric toaster and a room heater.
All of the above electric devices have metal coils inside. After the current passage, the temperature of these coils goes so high that they even release light in the case of a bulb along with the heat. In a toaster and room heater, the heat is released by these coils. The heating effect of electric current is extensively used in daily life. The electric kettle, toaster, heater, and other appliances replace traditional cooking and laundry methods. The same technique is used in electric bulbs, which provide an alternative to conventional illumination.

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