Water is being boiled in a flat bottomed kettle placed on a stove The area of the bottom is `300cm^(2)` and the thickness is `2mm` If the amount pf steam produced is `1gm min^(-1)` then the difference of the temperature between the inner and the outer surface of the bottom is (thermal conductivity of the matrial of the kettle `0.5calcm^(-1)C^(-1)` latent heat of the steam is equal to `540calg^(-1))` .

Options

A. `12^(@)C`
B. `2^(@)C`
C. `12^(@)C`
D. `0.012^(@)C`

Answer

D

Explanation

`(mL)/(t) =(KA(theta_(1)-theta_(2)))/(d)`