A) length 1 m and diameter 20 mm
B) length 2 m and diameter 20 mm
C) length 2 m and diameter 40 mm
D) length 1 m and diameter 40 mm
Correct Answer: D
Solution :
Rate of heat flow \[=H=\frac{\Delta \theta }{R}\] where \[R=k\frac{l}{A}=k\frac{4l}{\pi {{D}^{2}}}\] When R high then rate of heat flow low.You need to login to perform this action.
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