The dimensions of `(l)/(KA)` are (l is the length of rod, K is the thermal conductivity of rod and A is the area of cross-section of rod)

Options

A. `[ML^(2)T^(-3)K^(-1)]`
B. `[M^(-1)L^(-2)T^(3)K]`
C. `[ML^(2)T^(-3)K^(-2)]`
D. `[MLT^(-3)K^(-1)]`

Answer

B

Explanation

Rate of heat flow `(dQ)/(dt)= (Kad theta)/(l)`
or `(l)/(KA)= (d theta)/(dQ//dt) :. [(l)/(KA)]= [(K)/(ML^(2)T^(-3))]= [M^(-1)L^(-2)T^(3)K]`