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When a weight of 10kg is suspended from a copper wire of length 3m and diamerer 0.4 mm,it's length increases by 2.4cm if the diameter of the wire is doubledthen extension in the wire will be how much? |
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Answer» Solution :`E PROP 1/r^2 THEREFOR e_1//e_2 = r_1^2//r_2^2 = ((0.2)/(0.4))^2 = 1/4` `therefor `e_2 = e_1/4 = 2.4/4 0.6 cm. |
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