The ratio of the emissive power and absorptive power... - Solved MCQs & Answer

1578Mechanical EngineeringMedium

The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as________?

AWien’ law

BStefan’s law

CBlack body law

DKrichoff’s law

EPlanck’s law

Correct answer

D. Krichoff’s law

Explanation

The correct answer is Krichoff’s law.

Which of the following cycles uses air as the refrigerant________?

Which is false statement about case hardening. Case hardening is done by________?

Heavy duty leaf and coil spring* contain carbon of the following order ________?

Which is more viscous lub oil________?

The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is________?

Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of________?