Thermal Properties of Matter questions
823 published questions with worked solutions.
- A sphere of radius 50 cm is maintained at a constant temperature, radiates energy at the rate of 0.5 kcal/s. Then the emissive...
- A metal cube with each side 3 cm long emits 0.27 kcal in 100s. Then its emissive power is
- The emissive power of a surface depends upon:
- Emissivity of perfectly black body is
- The amount of heat energy radiated per seconds by a surface depends up on :
- The emissivity (e) of any body at a temperature is:
- E is emissive power and 'a' is the coefficient of absorption of a body at a certain temperature. If E_b is the emissive power of...
- Which of the following is best close to an ideal black body?
- A good absorber is a :
- Which of the following is more close to a black body?
- Highly polished surface are ________ of heat radiations:
- A black body emits: [NCERT 1982]
- The emissive power of sphere of area 0.02 m^2 is 0.5 kcal/sm^2 What is the amount of heat radiated by the spherical surface in 30...
- If the wavelength corresponding to maximum energy radiated from the moon is 14 micron, and Wien's constant is 2.8 10^ -3 K, then...
- If the temperature of a black body is increased then the wavelength corresponding to the maximum emission will
- Radiations which are trapped in green house are________ radiations.
- A star radiates maximum energy of wavelength _m at temperature T. What will be temperature of another star which radiates maximum...
- The wavelength corresponding to maximum emission for sun is 0.48 . The surface temperature of sun will be - (b = 3.0 10^ -3 m-K)
- The light emitted by the sun has the maximum wavelength of 570 nm. The light emitted by another star has the maximum wavelength...
- Solar radiation emitted by the sun resembles the radiations emitted by a black body at the temperature of 6000 K. Maximum...
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