A. √d
B. d
C. d2
D. d1.5
Advertisement
Related Mcqs:
- With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer ?
- A. Decreases B. Increases C. Increases exponentially D. Remain unaffected...
- Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be_________________?
- A. 0.35 B. 0.45 C. 0.55 D. 0.85...
- The thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. The value of ‘n’ is exactly 4 for__________________?
- A. Black painted bodies only B. All bodies C. Polished bodies only D. A black body...
- 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 energy is emitted by all the substances, which are above____________________?
- A. 0°K B. 0°C C. 100°C D. Room temperature...
- 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...
- A black body does not ____________ radiation?
- A. Absorb or emit B. Refract C. Reflect D. Both B. & C....
- Which one gives the monochromatic emissive power for black body radiation ?
- A. Planck’s law B. Kirchhoff’s law C. Wien’s law D. Stefan-Boltzmann law...
- The rate of emission of radiation by a body does not depend upon the__________________?
- A. Wavelength of radiation B. Surface temperature of the body C. Nature of the surface D. Shape and porosity of the body...
Advertisement
