The ends of an element of zinc wire are kept | vedclass

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(A) When a current $I$ flows through a conductor maintained at a temperature difference $\Delta T$, the total heat developed per unit time is the sum

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is proportional to $\Delta T$ and $I$

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(A) When a current $I$ flows through a conductor maintained at a temperature difference $\Delta T$, the total heat developed per unit time is the sum of Joule heating and Thomson heating.Joule heating is given by $P_J = I^2 R$, which is independent of $\Delta T$.Thomson heating is given by $P_T = \sigma I \Delta T$, where $\sigma$ is the Thomson coefficient.For a small temperature difference and small current, the heat developed due to the Thomson effect is proportional to the product of the current $I$ and the temperature difference $\Delta T$.

The ends of an element of zinc wire are kept at a small temperature difference $\Delta T$ and a small current $I$ is passed through the wire. Then, the heat developed per unit time

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