MHT CET 2023 9th May Morning Shift | Heat and Thermodynamics Question 69 | Physics

Two uniform brass rods $$A$$ and $$B$$ of length '$$l$$' and '$$2 l$$' and their radii '$$2 r$$' and '$$r$$' respectively are heated to same temperature. The ratio of the increase in the volume of $$\operatorname{rod} \mathrm{A}$$ to that of $$\operatorname{rod} \mathrm{B}$$ is

$$1: 1$$

$$1: 2$$

$$2: 1$$

$$1: 4$$

MHT CET 2023 9th May Morning Shift

MCQ (Single Correct Answer)

-0

A gas at N.T.P. is suddenly compressed to $$\left(\frac{1}{4}\right)^{\text {th }}$$ of its original volume. The final pressure in (Given $$\gamma=$$ ratio of sp. heats $$=\frac{3}{2}$$ ) atmosphere is ( $$\mathrm{P}=$$ original pressure)

$$4 \mathrm{P}$$

$$\frac{3}{2} \mathrm{P}$$

$$8 \mathrm{P}$$

$$\frac{1}{4} \mathrm{P}$$

MHT CET 2023 9th May Morning Shift

MCQ (Single Correct Answer)

-0

In a thermodynamic process, there is no exchange of heat between the system and surroundings. Then the thermodynamic process is

isothermal

isobaric

isochoric

adiabatic

MHT CET 2023 9th May Morning Shift

MCQ (Single Correct Answer)

-0

According to kinetic theory of gases, which one of the following statements is wrong?

All the molecules of a gas are identical.

Collisions between the molecules of a gas and that of the molecules with the walls of the container are perfectly elastic.

The molecules do not exert appreciable force on one another except during collision.

The pressure exerted by a gas is due to the collision between the molecules of the gas.

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