A. absolute temperature
B. square of temperature
C. fourth power of absolute temperature
D. fourth power of temperature
E. cube of absolute temperature
Related Mcqs:
- Stefan Boltzmann law is applicable for heat transfer by __________________?
A. conduction
B. convection
C. radiation
D. conduction and radiation combined
E. convection and radiation combined - The unit of Stefan Boltzmann constant is ____________________?
A. watt/cm2 °K
B. watt/cm4 °K
C. watt2/cm °K4
D. watt/cm2 °K4
E. watt/cm2 °K2 - According to Stefan’s law, the total radiation from a black body per second per unit area is proportional to____________________?
A. absolute temperature
B. T2
C. T5
D. t
E. l/T - 40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is____________________?
A. 0.45
B. 0.55
C. 0.40
D. 0.75
E. 0.60 - According to Wien’s law, the wavelength corresponding to maximum energy is proportion to ________________?
A. absolute temperature (T)
B. I2
C. f
D. t
E. 1/r - The energy distribution of an ideal reflector at higher temperatures is largely in the range of ___________________?
A. shorter wavelength
B. longer wavelength
C. remains same at all wavelengths
D. wavelength has nothing to do with it
E. none of the above - The ratio of the energy absorbed by the body to total energy falling on it is called_________________?
A. absorptive power
B. emissive power
C. absorptivity
D. emissivity
E. none of the above - The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as ________________?
A. emissivity
B. transmissivity
C. reflectivity
D. intensity of radiation
E. absorptivity - According to Kirchoff’s law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a _________________?
A. grey body
B. brilliant white polished body
C. red hot body
D. black body
E. none of the above - Planck’s law holds good for________________?
A. black bodies
B. polished bodies
C. all coloured bodies
D. all of the above
E. none of the above
