The amount of heat conducted out per second through a window, when inside temperature is `10^(@)C` and outside temperature is `-10^(@)C`, is 1000 J. Same heat will be conducted in through the window, when outside temperature is `-23^(@)C` and inside temperature is:

Options

A. `23^(@)C`
B. 230K
C. 270K
D. 296K

Answer

C

Explanation

For the same heat to be conducted, temperature difference must be same. Initial temperature difference `= 10-(-10) = 20^(@) C= 20K`
Outside temperature `= -23^(@)C = -23 + 273 = 250K`
`:.` Inside temperature `=250 + 20 = 270K`