Which of the following equipment does not work on principle of Joule's law?
A
Electric Heater
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B
Electric Iron
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C
Electric Bulb
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D
Electric Fan
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Solution
The correct option is D Electric Fan The electric iron, electric heater and electric bulb are some of the familiar devices based on Joule’s Law, but electric fan is not based on Joule's Law. Thus option D is correct.