Thermal Properties of Matter questions
823 published questions with worked solutions.
- The power radiated by a black body is P and it radiates maximum energy around the wavelength _0. Now the temperature of the black...
- A bucket full of hot water is kept in room. If it cools from 75^ to 70^ in t_1 minute, from 70^ to 65^ in t_2 minute and 65^ to...
- Consider two rods 1 and 2 of same length.. They have different specific heats (C_1, C_2), thermal conductivities (K_1, K_2) and...
- 'x' joule of heat is incident on a body. Out of it, the total heat reflected and transmitted by it is 'y' joule. The absorption...
- A body cools from a temperature 3 to 2 in 10 minute. The room temperature is . The temperature of the body at the end of the next...
- A black body radiates maximum energy at wavelength ' ' at temperature T<sub>1</sub> and its emissive power is E. When the...
- The co-efficient of absorption and the coefficient of reflection of a thin uniform plate are 0.77 and 0.17 respectively. If 250...
- Black sphere of radius R radiates power P at certain temperature T. If the temperature is doubled, the radius gets doubled. Now...
- Two rods of different materials have lengths ' _1' and ' _2' whose coefficient of linear expansions are ' _1' and ' _2'...
- Out of the following, which statement is NOT true about black body radiation ?
- A black body is at temperature 827^oC. The rate at which it emits energy is proportional to
- When 170 J of energy is incident on a surface of a body, 17 J of energy is reflected by it. If the coefficient of absorption is...
- For a perfectly black body, coefficient of emission is
- A black body is at temperature of 5780 K. The energy of radiation emitted by the body at wavelength 300 nm is U_1 at wavelength...
- A sphere having temperature 600 K is losing heat due to radiation. At this temperature its rate of cooling is 'R'. The rate of...
- Hot water cools from 80°C to 60°C in 1 minutes. In cooling from 60°C to 50°C it will take (room temperature =30°C)
- The two ends of a rod of length 'x' and uniform cross-sectional area 'A' are kept at temperatures 'T_1' and 'T_2' respectively...
- Two bodies A and B at temperatures 'T_1' K and 'T_2' K respectively have the same dimensions. Their emissivities are in the ratio...
- The temperature of a body on Kelvin scale is 'x' K. When it is measured by a Fahrenheit thermometer, it is found to be 'x' ^ ....
- If 120 J of thermal energy is incident on area 3 m², the amount of heat transmitted is 12J, coefficient of absorption is 0.6,...
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