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On loading a metal wire of cross section
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Correct option is A
msΔT=12Fe ΔT=Fe2MS
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A metal bar of length L and area of cross-section A is rigidly clamped between two walls. The Young's modulus of its material is Y and the coefficient of linear expansion is . The bar is heated so that its temperature increases by °C. Then the force exerted at the ends of the bar is given by
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