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A cylindrical rod of length l and cross ...

A cylindrical rod of length l and cross - sectional radius r is placed at a distance of 50 r from a infrared point source S of power 1.25 kw as shown in the figure. The lateral surface of the rod is perfectly insulated from the surroundings . If the cross - section A absorbs 80 % of the incident energy and the temperature difference between the ends of the rod is constant , then the rate of heat flow through the rod in steady state is

A

0.2 J/s

B

0.125 J/s

C

0.1 J/S

D

0.25 J/s

Text Solution

Verified by Experts

The correct Answer is:
C
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