Physics
The efficiency of a Carnot engine operating between temperature of 100 degree C and − 23 degree C will be :
16
Sep
The efficiency of a Carnot engine operating between temperature of 100 degree C and − 23 degree C will be : The efficiency of a Carnot engine operating between temperature of 100 degree C and − 23 degree C will be : September 16, 2020 Category: Chapter 18 - Thermodynamics , NEET Last 32 Years [...]
An engine takes heat from a reservoir and converts its 1/6 part into work. By decreasing temperature of sink by 62 degree C, its efficiency becomes double. The temperatures of source and sink must be
16
Sep
An engine takes heat from a reservoir and converts its 1/6 part into work. By decreasing temperature of sink by 62 degree C, its efficiency becomes double. The temperatures of source and sink must be An engine takes heat from a reservoir and converts its 1/6 part into work. By decreasing temperature of sink by [...]
The temperatures of source and sink of a heat engine are 127 degree and 27 degree respectively. An inventor clams its efficiency to be 26%, then,
16
Sep
The temperatures of source and sink of a heat engine are 127 degree and 27 degree respectively. An inventor clams its efficiency to be 26%, then, The temperatures of source and sink of a heat engine are 127 degree and 27 degree respectively. An inventor clams its efficiency to be 26% then September 16, 2020 [...]
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 [...]
Two masses of 1 g and 9 g are moving with equal kinetic energies. The ratio of the magnitudes of their respective linear momenta is
16
Sep
Two masses of 1 g and 9 g are moving with equal kinetic energies. The ratio of the magnitudes of their respective linear momenta is Two masses of 1 g and 9 g are moving with equal kinetic energies. The ratio of the magnitudes of their respective linear momenta is September 16, 2020 Category: Chapter [...]
Two spheres of same size one of mass 2 kg and another of mass 4 kg are dropped simultaneously from the top of Qutab Minar (height = 72 m). When they are 1 m above the ground, the two spheres have the same:
05
Sep
Two spheres of same size one of mass 2 kg and another of mass 4 kg are dropped simultaneously from the top of Qutab Minar (height = 72 m). When they are 1 m above the ground, the two spheres have the same: the two spheres have the same: Two spheres of same size one [...]
A ball is thrown vertically upwards. Which of the following plots represents the speed-time graph of the ball during its flight if the air resistance is not ignored?
05
Sep
A ball is thrown vertically upwards. Which of the following plots represents the speed-time graph of the ball during its flight if the air resistance is not ignored? A ball is thrown vertically upwards. Which of the following plots represents the speed-time graph of the ball during its flight if the air resistance is not [...]
A body released from a height falls freely towards earth. Another body is released from the same height exactly one second later. The separation between the two bodies two second after the release of the second body is nearly
05
Sep
A body released from a height falls freely towards earth. Another body is released from the same height exactly one second later. The separation between the two bodies two second after the release of the second body is nearly is The ratio of magnitudes of average speed to average velocity September 5, 2020 Category: Chapter [...]