"The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium". This is __________ law.

Related MCQs

• According to Kirchoff’s law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a
• 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
• When a body is in thermal equilibrium with its surroundings, the absorptivity and the emissivity of the body are same. This Law is known as
• The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoff‟s law.
• As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the
• Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity?
• A wall has two layers A and B, each made of a different material. Both the layers have the same thickness. The thermal conductivity of material of A is twice that of B. Under the thermal equilibrium the temperature difference across the wall is 30?C. The temperature drops in layers A and B will be respectively
• There metal walls of same cross-sectional area having thermal conductivity in the ratio 1 : 2 : 4 transfer heat at the rate of 15000 kcal/hr. For same thickness of wall, the temperature deop will be in the ratio
• If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of
• The statement that the emissivity and absorptivity of a surface is surrounded by its own temperature are the same for both monochromatic and total radiation, is known as