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As shown in the figure AB is a rod of le...

As shown in the figure AB is a rod of length 30 cm and area of cross section 1.0 `am^(2)` and thermal conductivity 336 SI units. The ends A and B are maintained at temperature`20^(@)Cand40^(@)C` respectively. A point C of this rod is connected to a box D, containing ice at `0^(@)C` through a highly conducting wire of negligible heat capacity. The rate at which ice melts in the box is : (Assume latent heat of fusion for ice `L_(f)=80cal//g)`

A

`"84 mg s"^(-1)`

B

`"84 m s"^(-1)`

C

`"20 mg s"^(-1)`

D

`"40 mg s"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
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