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The ends of copper rod of length `1m` and area of cross section `1cm^(2)` are maintained at `0^(@)C` and `100^(@)C`. At the centre of rod, there is a source of heat of `32W`. The thermal conductivity of copper is `400W//mK` A. The temperature of rod at centre is `250^(@)C`B. The temperature of rod at centre is `50^(@)C`C. The temperature gradient in right half is `500^(@)C//m`D. The temperature gradient in left half is `300^(@)C//m` |
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Answer» Correct Answer - A::C::D Since there is no accumulation of energy `(400xx10^(-4)(100-theta))/(1//2)+32=(400xx10^(-4)theta)/(1//2)` `theta=250^(@)C` temperature gradient in right half `=250/(1//2)=300^(@)C//m` similarly in left half `=(250-100)/(1//2)=300^(@)C//m` |
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