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Byju's Answer

Standard XII

Physics

Com of Solid Bodies

In the figure...

Question

In the figure shown AB is a rod of length 30 $c m$ and area of cross-section 1.0 $c m^{2}$ and thermal conductivity 336 S.I. units. The ends A & B are maintained at tempratures $20^{o}$ and $40^{o}$ respectively. A point C of this rod is connected to a box D, containing ice at $0^{o}$ , through a highly conducting wire of negligible heat capacity. Find the initial rate (in $m g / s$ ) at which ice melts in the box. [Assume latent heat of fusion for ice $L_{f} = 80 c a l / g m$ ]

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Solution

The correct option is D. 40.

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