Questions
One end of a conducting rod is maintained at temperature 50oC and at the other end ice is melting at 0oC. The rate of melting of ice is doubled if
a
The temperature is made 200oC and the area of cross-section of the rod is doubled.
b
The temperature is made 100oC and length of the rod is made four times.
c
The area of cross-section of the rod is halved and length is doubled.
d
The temperature is made 100oC and the area of cross-section and length both are doubled.
detailed solution
Correct option is D
In steady state, Q=KA.∆θl⇒Q∝A.∆θlRate of melting of ice is doubled when Q is doubled option-(4) only satisfies this condition.Talk to our academic expert!
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