Questions
Two bodies A and B are said to be in thermal equilibrium with each other, if :
- heat flows from A to B
- heat flows from B to A
- both the bodies lose equal amounts of heat to the atmosphere
- heat does not flow from either A or B
For 2 gases in thermal equilibrium with each other , Pressure of the gases
- varies as speed of the gas molecules
- varies as square root of the gas molecules
- varies inversely as the gas molecules
- remains same
Two systems are in thermal equilibrium. The quantity which is common for them is
- heat
- momentum
- specific heat
- temperature
When a gas is in thermal equilibrium, its molecules
- have the same average kinetic energy.
- have different energies which remains constant.
- have a certain constant energy.
- do not collide with one another.
Two metal spheres of different radii having same temperature are placed in thermal contact in a vaccum. Which of the following quantities is certainly correct?
- Each sphere has the same internal energy
- There is no net transfer of thermal energy between the spheres
- Both spheres radiate electromagnetic energy at the same rate
- The larger sphere a greater mean internal energy per atom than the smaller sphere
Two bodies are in thermal equilibrium if they have same
- temperature
- amount of heat
- specific heat
- thermal capacity
Two bodies A and B are said to be in thermal equilibrium with each other, if
- heat flows from A to B
- heat flows from B to A
- both the bodies lose equal amunts of heat to the atmosphere
- heat does not flow from either A or B
Two systems in thermal equilibrium with a third system separately are in thermal equilibrium with each other.
The above statement is
- First law of thermodynamics
- Second law of thermodynamics
- Third law of thermodynamics
- Zeroth law of thermodynamics
Three bodies $A, B$ and $C$ are in thermal equilibrium.
The temperature of $B$ is $45^{\circ}C$. Then the temperature of $'C'$ is _____
- $45^{\circ}C$
- $50^{\circ}C$
- $40^{\circ}C$
- Any temperature
In thermal equilibrium concepts, heat lost by hot body is equal to
- Heat gained by hot body
- Heat gained by cold body
- Both (a) and (b)
- None of these
The variance defined by Zeroth law of thermodynamics is
- Temperature
- Internal energy
- Work
- All of these
Four cubes of ice at $-10^{o}C$ each one gm is taken out from the refrigerator and are put in $150\ gm$ of water at $20^{o} C$. The temperature of water when thermal equilibrium is attained. Assume that no heat is lost to the outside and water equivalent of container is $46\ gm$. (Specific heat capacity of water $=1\ cal/gm-\ ^{o}C$, Specific heat capacity of fusion of ice $=0.5 cal/gm-\ ^{o}C$, Latent heat of fusion of ice $= 80\ cal/gm$)
- $0^{o}C$
- $-10^{o}C$
- $17.9^{o}C$
- $None$
$1\ g$ of ice is mixed with $1\ g$ of steam. At thermal equilibrium, the temperature of the mixture is
- $50^{\circ}C$
- $0^{\circ}C$
- $55^{\circ}C$
- $100^{\circ}C$
Two bodies are said to be in the state of thermal equilibrium if there is no transfer of heat taking place between them. True or false.
- True
- False