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One end of conducting rod is maintained ...

One end of conducting rod is maintained at temperature `50^(@)C` and at the other end ice is melting at `0^(@)C`. The rate of melting of ice is doubled if:

A

the temperature is made `200^(@)C` and the area of corss-section of the rod is doubled

B

the temperature is made `100^(@)C` and length of the rod is made four times

C

area of cross-section of rod is halved and length doubled

D

the temperature is made `100^(@)C` and area cross-section of rod and length both are doubled

Text Solution

Verified by Experts

The correct Answer is:
D
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When 1 g of ice melts at 0^@C

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One end of the rod of length l, thermal conductivity K and area of cross-section A is maintained at a constant temperature of 100^@C . At the other end large quantity of ice is kept at 0^@C . Due to temperature difference, heat flows from left end to right end of the rod. Due to this heat ice will start melting. Neglecting the radiation losses find the expression of rate of melting of ice. .

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During the melting of ice, temperature .

One end of a metal rod of length 1.0 m and area of cross section 100 cm^(2) is maintained at . 100^(@)C . If the other end of the rod is maintained at 0^(@)C , the quantity of heat transmitted through the rod per minute is (Coefficient of thermal conductivity of material of rod = 100 W//m-K )

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