A. Total
B. Monochromatic
C. Both A. & B.
D. Neither A. nor B.
Related Mcqs:
- The ratio of total radiating power to the absorptivity of the body depends upon the _____________ as per Kirchoff‟s law?
A. Wavelength of radiation
B. Nature of the body
C. Temperature of the body
D. None of these - Kirchoff’s law is applicable to________________?
A. Monochromatic radiation only
B. Total radiation only
C. Both A. and B.
D. Only volumes and not to surfaces - As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?
A. Temperature of the body only
B. Wavelength of monochromatic radiation
C. Both A. and B.
D. Nature of material of body - Stefan-Boltzmann law applies to _____________ body?
A. Black
B. White
C. Grey
D. Any colour - Fourier’s law of heat conduction applies to _____________ surfaces?
A. Isothermal
B. Non-isothermal
C. Both A. and B.
D. Neither A. and B. - Stefan’s block body radiation law can also be derived from ______________ law?
A. Kirchoff’s
B. Planck’s
C. Fourier’s
D. None of these - Fourier’s law applies to the heat transfer by__________________?
A. Convection
B. Radiation
C. Conduction
D. All A., B. & C. - Stefan-Boltzmann law which describes the radiation heat transfer states that, it is proportional to (where, t = temperature in °C T = absolute temperature in ° K) ?
A. t4
B. T4
C. 1/t4
D. 1/T4 - The statement that “maximum wavelength of radiation is inversely proportional to the temperature” is ______________ law?
A. Stefan-Boltzmann’s
B. Planck’s
C. Wien’s displacement
D. None of these - Radiation heat losses from satisfactorily insulated high pressure boiler may be about _____________ percent?
A. 1
B. 7
C. 18
D. 26
