Why is much less heat generated in long elect | vedclass

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Question

(C) According to Joule's law of heating,the heat generated $(H)$ in a conductor is given by $H = I^2Rt$,where $I$ is the current,$R$ is the resistance

Vedclass · Accepted Answer

Cables have low resistance,while filaments have high resistance.

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(C) According to Joule's law of heating,the heat generated $(H)$ in a conductor is given by $H = I^2Rt$,where $I$ is the current,$R$ is the resistance,and $t$ is the time.Electric cables are typically made of thick copper wires,which have a very low resistance $(R)$.In contrast,the filaments of electric bulbs are made of thin tungsten wire,which has a very high resistance $(R)$.Since the heat generated is directly proportional to the resistance $(H \propto R)$,the low resistance of the cables results in significantly less heat generation compared to the high resistance of the bulb filaments.

Why is much less heat generated in long electric cables than in filaments of electric bulbs?

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