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

The heat supplied under these conditions is the change in internal energy `Q = Delta U`. The heat supplied is `Q = i^(2) Rt xx 1 xx 1xx 100 xx 5 xx 60 = 30000 J = 30 kJ`.