Chapter 17 – Thermal Properties of Matter
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We consider the radiation emitted by the human body. Which of the following statements is true ?
16
Sep
We consider the radiation emitted by the human body. Which of the following statements is true ? We consider the radiation emitted by the human body. Which of the following statements is true ? September 16, 2020 Category: Chapter 17 - Thermal Properties of Matter , NEET Last 32 Years Solved 1988 - 2019 Physics [...]
If λm denotes the wavelength at which the radioactive emission from a black body at a temperature T K is maximum, then:
16
Sep
If λm denotes the wavelength at which the radioactive emission from a black body at a temperature T K is maximum, then: If λm denotes the wavelength at which the radioactive emission from a black body at a temperature T K is maximum then September 16, 2020 Category: Chapter 17 - Thermal Properties of Matter [...]
Thermal capacity of 40 g of aluminium ( s= 0.2 cal / g-K ) is
16
Sep
Thermal capacity of 40 g of aluminium ( s= 0.2 cal / g-K ) is Thermal capacity of 40 g of aluminium ( s= 0.2 cal / g-K ) is September 16, 2020 Category: Chapter 17 - Thermal Properties of Matter , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions [...]
The value of coefficient of volume expansion of glycerin is 5 × 10^−4 K^−1 The fractional change in the density of glycerin for a rise of 40 degree C in its temperature is:-
31
Aug
The value of coefficient of volume expansion of glycerin is 5 × 10^−4 K^−1 The fractional change in the density of glycerin for a rise of 40 degree C in its temperature is:- The value of coefficient of volume expansion of glycerin is 5 × 10^−4 K^−1 The fractional change in the density of glycerin [...]
A black body at 1227 degree C emits radiations with maximum intensity at a wavelength of 5000 A˚. The temperature of the body is increased by 1000 degree C, the maximum intensity will be observe at:-
31
Aug
A black body at 1227 degree C emits radiations with maximum intensity at a wavelength of 5000 A˚. The temperature of the body is increased by 1000 degree C, the maximum intensity will be observe at:- A black body at 1227 degree C emits radiations with maximum intensity at a wavelength of 5000 A˚. The [...]
Assuming the sun to have a spherical outer surface of radius r radiating like a black body at temperature t degree C. The power received by a unit surface (normal to the incident rays) at a distance R from the centre of the sun is where sigma is the Stefan’s constant.
31
Aug
Assuming the sun to have a spherical outer surface of radius r radiating like a black body at temperature t degree C. The power received by a unit surface (normal to the incident rays) at a distance R from the centre of the sun is where sigma is the Stefan’s constant. A piece of iron [...]
A black body is at 727 degree C. It emits energy at a rate which is proportional to
31
Aug
A black body is at 727 degree C. It emits energy at a rate which is proportional to A black body is at 727 degree C. It emits energy at a rate which is proportional to August 31, 2020 Category: Chapter 17 - Thermal Properties of Matter , NEET Last 32 Years Solved 1988 - [...]
The power radiated by a black body is P and it radiates maximum energy at wavelength, λ0. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength 4/3λ0, the power radiated by it becomes nP. The value of n is?
31
Aug
The power radiated by a black body is P and it radiates maximum energy at wavelength, λ0. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength 4/3λ0, the power radiated by it becomes nP. The value of n is? The power radiated by a black body [...]
A black body at 227°C radiates heat at the rate of 7 cals/cm² s^1. At a temperature of 727°C, the rate of heat radiated in the same units will be
31
Aug
A black body at 227°C radiates heat at the rate of 7 cals/cm² s^1. At a temperature of 727°C, the rate of heat radiated in the same units will be A black body at 227°C radiates heat at the rate of 7 cals/cm² s^1. At a temperature of 727°C the rate of heat radiated in [...]
If the radius of a star R and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is Q? (σ for stefan’s constant.)
31
Aug
If the radius of a star R and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is Q? (σ for stefan’s constant.) If the radius of a star R and it acts as a black body in which the rate of energy [...]