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18. Drive an expression for Joule's law of heating. |
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Answer» Work done in carrying a charge Q through a potential difference V is given as Also, Q = I t Using Ohm's law, V = IR W = I2RtThis work done in carrying the charge through the wire appears as the heat produced. i.e., H = VIt = I2Rt. this energy is dissipated as heat energy. This relationship is also known as Joule's Law of Heating |
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