One end of a cylindrical rod is kept in steam chamber and the other end in melting Ice. Now 0.5 gm of ice melts…

Q: One end of a cylindrical rod is kept in steam chamber and the other end in melting Ice. Now 0.5 gm of ice melts in 1sec. If the rod is replaced by another rod of same length, half the diameters and double the conductivity of the first rod, then rate melting of ice will be (in gm/ sec)

(a) 0.25

(b) 0.5

(c) 1

(d) 2

Ans: (a)