Statement I: Two solid cylindrical rods of identical size and different thermal conductivity `K_1` and `K_2` are connected in series. Then the equivalent thermal conductivity of two rods system is less than that value of thermal conductivity of either rod.
Statement II: For two cylindrical rods of identical size and different thermal conductivity `K_1` and `K_2` connected in series, the equivalent thermal conductivity K is given by `(2)/(K)=(1)/(K_1)+(1)/(K_2)`

Options

A. Statement -`1` is True , Statement -`2` is True , Statement -`2` is correct explanation for Statement - `1`
B. Statement -`1` is True , Statement -`2` is True , Statement -`2` is not correct explanation for Statement - `1`
C. Statement -`1` is True , Statement -`2` is False.
D. Statement -`1` is False , Statement -`2` is True.

Answer

D