A grey body is one which absorbs all radiations incident on it.

At thermal equilibrium, the emissivity and absorptivity are same.

The energy absorbed by a body to the total energy falling on it, is called emissivity.

A perfect body is one which is black in colour.

Correct

Incorrect

temperature

humidity

pressure

none of these

remains constant

increases

decreases

none of these

heat supplied by the gas burner to the heat absorbed by the evaporator

heat absorbed by the evaporator to the heat supplied by the gas burner

heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner

heat absorbed by the evaporator minus the heat supplied by the gas burner to the heat absorbed by the evaporator