List of top Physics Questions on Thermodynamics asked in GAT-B

Half-life $(T_{1/2})$ of a radioisotope is related to decay constant $(\lambda)$:

The mean square speed $(\langle v^2 \rangle)$ of the molecules of a gas at absolute temperature $T$ is proportional to

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The major source of energy for the basic functioning of the cell is derived from oxidative metabolism.
Reason R: Mitochondria oxidize substrates to $CO_{2}$, transferring the high energy electron from molecular oxygen to glucose.

What will happen when the pressure is doubled in an isothermal process for a closed system containing a fixed amount of an ideal gas?

Cooling water enters the cooling coil of a fermenter at $7$°C and leaves at $27$°C because it picks up the heat generated due to microbial growth. The culture temperature is $37$°C. The average temperature difference which is used to calculate the rate of heat transfer is:

Given a constant Power number, the power consumption of an agitator having geometric similarity but twice the diameter of a smaller agitator will consume ________ power at the same RPM as the smaller agitator.

A solid which is not transparent to visible light and whose conductivity increases with temperature is formed by:

A radioactive material has a half life of 10 years. What fraction of radioactive nuclei will remain undecayed with respect to the initial sample after 20 years?