An ideal gas is filled in a closed rigid and thermally insulated container. A coil of `100Omega` resistor carrying current 1 A for 5 minutes supplies heat to the gas. The change in internal energy of the gas is

Options

A. 10 kJ
B. 30 kJ
C. 20 kJ
D. 0 kJ

Answer

B

Explanation

(b) The heat supplied under these conditions is the change in internal energy
`Q = DeltaU`
The heat supplied `Q = i^2RT`
`= 1 xx 1 xx 100 xx 5 xx 60 = 30,000J = 30 kJ`.