InterviewSolution
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InterviewSolution
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What is jouls law |
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Answer» i^2 rt Joule’s law of heating states that when a current ‘i \' passes through a conductor of resistance ‘r’ for time ‘t’ then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time.\xa0H = i 2 rtThe reason behind the heat produced is the collision of the free electrons with the lattice ions or atoms while accelerating in presence of the external electric field.we know thatvolt= work done/ total charge or v = w/qfrom this we get w= vqwe know that current i = q / tso q = itputting this in prev equationwe get w = vitfrom ohms law v = irputting it in prev eq we getw = irit = i2rt joule as work is stored as heat soH = I2RT Joules |
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