If the piston is moved so as to reduce the volume of gas by half keeping the temperature of gas constant, we know from the gas law that the pressure will be doubled. On microscopic level the increase in pressure on the piston is because

Options

A. momentum change per collision is doubled while the frequency of collision remains constant
B. momentum change per collision remains constant while the frequency of collision is doubled
C. momentum change per collision and the frquency of collision both are increased
D. none of these two physical quantities are changed. It is due to some other reason.

Answer

B

Explanation

As temp. is not charged, `v_(rms)` does not change hence frequency of collision is doubled due to length of round trip is halved.