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One end of a copper rod of length 1.0 m and area of cross-section 103 is immersed in boiling water and the other end in ice. If the coefficient of thermal conductivity of copper is 92cal/msC and the latent heat of ice is 8×104cal/kg, then the amount of ice which will melt in one minute is



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Solution

The correct option is B

Heat transferred in one minute is utilised in melting the  ice so,  KA(θ1θ2)tl=m×L
m=103×92×(1000)×601×8×104=6.9×103kg
 
 

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