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InterviewSolution
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State and explain the Joule.s law ofheating. |
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Answer» Solution :The quantity of heat generated in a CONDUCTOR when a current flows through it is (1) DIRECTLY proportional to the square of current for a given resistance and the TIME-interval for which the current flows. (2) directly proportional to the resistance for a given current and time- interval. (3) directly proportional to the time for which the current flows through the resistor fora given resistance and current, Le., `H =i^2Rt` This mathematical expression (equation) is called the Joule LAW of heating. From the Joule.s law of heating it is clearthat the heat (H) produced in a conductor due to ELECTRIC current depends upon (1) the current (IJ (2) the resistance (R) of the conductor (3) the time (t) for which the current flows. |
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