Question

A cylindrical rod has one
end in a steam chamber
and the other end in ice.
It is found that 2gm of
ice melt per second. If
the first rod is replaced
by another one of the
same material, double
the length and double
area of cross section
then the mass of ice
melts per second is,​

Answer 1

Answer:

Thermal conduction in a metal bar is given by:

Q=lKA(Δθ)t=miLi

mi∝lA

m1m2=A1A2×l2l1=A2A×2ll=1

m2=m1=1gm