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हल तरs ली010 2>> रिटिय्य 2-नभ N s e |
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Answer» Ans :- 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. H = i^2rt The 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 that volt= work done/ total charge or v = w/q from this we get w= vq we know that current i = q / t so q = it putting this in prev equation we get w = vit from ohms law v = ir putting it in prev eq we get w = irit = i^2rt joule as work is stored as heat so H = I^2RT Joules. PLEASE LIKE THE ANSWER |
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