JEE Mains Physics 2002-2019 Solved Video Solutions
When heat Q is supplied to a diatomic gas of rigid molecules, at constant volume its temperature increases by ΔT. The heat required to produce the same change in temperature, at a constant pressure is :
10
Sep
When heat Q is supplied to a diatomic gas of rigid molecules, at constant volume its temperature increases by ΔT. The heat required to produce the same change in temperature, at a constant pressure is : at a constant pressure is : at constant volume its temperature increases by ΔT. The heat required to produce [...]
A cylinder with fixed capacity of 67.2 lit contains helium gas at STP. The amount of heat needed to raise the temperature of the gas by 20 C is :
10
Sep
A cylinder with fixed capacity of 67.2 lit contains helium gas at STP. The amount of heat needed to raise the temperature of the gas by 20 C is : A cylinder with fixed capacity of 67.2 lit contains helium gas at STP. The amount of heat needed to raise the temperature of the gas [...]
Two materials having coefficients of thermal conductivity ′ 3K ′ and ′ K ′ and thickness ‘d’ and ′ 3d ′ , respectively, are joined to form a slab as shown in the figure. The temperature of the outer surfaces are ′ θ2 ′ and ′ θ1 ′ respectively, (θ2 > θ1 ). The temperature at the interface is?
10
Sep
Two materials having coefficients of thermal conductivity ′ 3K ′ and ′ K ′ and thickness ‘d’ and ′ 3d ′ , respectively, are joined to form a slab as shown in the figure. The temperature of the outer surfaces are ′ θ2 ′ and ′ θ1 ′ respectively, (θ2 > θ1 ). The [...]
Tags:
(θ2 > θ1 ). The temperature at the interface is? ,
are joined to form a slab as shown in the figure. The temperature of the outer surfaces are ′ θ2 ′ and ′ θ1 ′ respectively ,
respectively ,
Two materials having coefficients of thermal conductivity ′ 3K ′ and ′ K ′ and thickness 'd' and ′ 3d ′ ,
The figure shows two process A and B for a gas. If ΔQ A and ΔQB are the amount of heat absorbed by the system in two cases. and ΔUA and ΔUB are changes in internal energies, respectively, then:
10
Sep
The figure shows two process A and B for a gas. If ΔQ A and ΔQB are the amount of heat absorbed by the system in two cases. and ΔUA and ΔUB are changes in internal energies, respectively, then: respectively The figure shows two process A and B for a gas. If ΔQ [...]
The given diagram shows four processes i.e., isochoric, isobaric, isothermal and adiabatic. The correct assignment of the processes, in the same order is given by :
10
Sep
The given diagram shows four processes i.e., isochoric, isobaric, isothermal and adiabatic. The correct assignment of the processes, in the same order is given by : in the same order is given by : isobaric isochoric isothermal and adiabatic. The correct assignment of the processes The given diagram shows four processes i.e. September 10, 2021 [...]
A thermally insulated vessel contains 150g of water at 0 C. Then the air from the vessel is pumped out adiabatically. A fraction of water turns into ice and the rest evaporates at 0 C itself. The mass of evaporated water will be closest to: (Latent heat of vaporization of water = 2.10×10^6 J kg^−1 and Latent heat of Fusion of water =3.36×10^5 J kg^−1 )
10
Sep
A thermally insulated vessel contains 150g of water at 0 C. Then the air from the vessel is pumped out adiabatically. A fraction of water turns into ice and the rest evaporates at 0 C itself. The mass of evaporated water will be closest to: (Latent heat of vaporization of water = 2.10×10^6 J kg^−1 [...]
If N0 is the original mass of the substance of half-life period t 1/2 = 5 years, then the amount of substance left over 15 years is
04
Sep
If N0 is the original mass of the substance of half-life period t 1/2 = 5 years, then the amount of substance left over 15 years is If N0 is the original mass of the substance of half-life period t 1/2 = 5 years then the amount of substance left over 15 years is September [...]
If the binding energy of the electron in a hydrogen atom is 13.6eV, the energy required to remove the electron from the first excited state of Li^2+ is :
04
Sep
If the binding energy of the electron in a hydrogen atom is 13.6eV, the energy required to remove the electron from the first excited state of Li^2+ is : If the binding energy of the electron in a hydrogen atom is 13.6eV the energy required to remove the electron from the first excited state of [...]
In the nuclear fusion reaction 1 2H+ 1 3H→ 2 4He+n given that the repulsive potential energy between the two nuclei is −7.7×10^−14 J, the temperature at which the gases must be heated to initiate the reaction is nearly (Boltzmann’s constant k=1.38×10^−23 J/K)
04
Sep
In the nuclear fusion reaction 1 2H+ 1 3H→ 2 4He+n given that the repulsive potential energy between the two nuclei is −7.7×10^−14 J, the temperature at which the gases must be heated to initiate the reaction is nearly (Boltzmann’s constant k=1.38×10^−23 J/K) In the nuclear fusion reaction 1 2H+ 1 3H→ 2 4He+n given [...]
A radioactive sample at any instant has its disintegration rate 5000 disintegration per minute. After 5 minutes, the rate is 1250 disintegrations per minute. Then, the decay constant, per minute, is
04
Sep
A radioactive sample at any instant has its disintegration rate 5000 disintegration per minute. After 5 minutes, the rate is 1250 disintegrations per minute. Then, the decay constant, per minute, is A radioactive sample at any instant has its disintegration rate 5000 disintegration per minute. After 5 minutes is per minute the decay constant the [...]