A P-T graph is shown for a cyclic process. Select correct stateme… - Vidyadip

MCQ

A $P-T$ graph is shown for a cyclic process. Select correct statement regarding this

A
During process $C D$, work done by gas is negative
B
During process $A B$, work done by the gas is positive
✓
During process $B C$ internal energy of system increases
D
During process $B C$ internal energy of the system decreases

✓

Answer

Correct option: C.

During process $B C$ internal energy of system increases

c
(c)

In process $B C$ (isochoric process) where $\Delta T$ is (+)ive.

So $\Delta U=n C_v \Delta T$

$\because \Delta T$ is positive $\Rightarrow U$ increases

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 11. thermodynamics→11. thermodynamics — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

A star is modeled as a uniform spherical distribution of matter keeping mass of star constant. How gravitational pressure on surface depends on volume of the star?

The energy of a given sample of an ideal gas depends only on its:

A current-carrying, straight wire is kept along the axis of a circular loop carrying a current. The straight wire:

If radius of $O _{2}$ molecule $=40 \mathring A, T =27^{\circ} C$ and $P =1 \,atm .$ Find the time of relaxation.

Two particles are moving along two long straight lines, in the same plane, with the same speed $= 20 \,\,cm/s$. The angle between the two lines is $60^o$, and their intersection point is $O$. At a certain moment, the two particles are located at distances $3\,m$ and $4\,m$ from $O$, and are moving towards $O$. Subsequently, the shortest distance between them will be

Two skaters $P$ and $Q$ are skating towards each other. Skater $P$ throws a ball towards $Q$ every $5 \,s$ such that it always leaves her hand with speed $2 \,ms ^{-1}$ with respect to the ground. Consider two cases:

$(I)$ $P$ runs with speed $1 \,ms ^{-1}$ towards $Q$, while $Q$ remains stationary.

$(II)$ $Q$ runs with speed $1 \,ms ^{-1}$ towards $P$, while $P$ remains stationary.

Note That irrespective of speed of $P$, ball always leaves $P$ s hand with speed $2 \,ms ^{-1}$ with respect to the ground. Ignore gravity. Balls will be received by $Q$.

A ball of mass $m$ is thrown vertically upward. Another ball of mass $2\,m$ is thrown an angle $\theta$ with the vertical. Both the balls stay in air for the same period of time. The ratio of the heights attained by the two balls respectively is $\frac{1}{x}$. The value of $x$ is $.....$

A particle is projected from ground with speed $80 \,m / s$ at angle $30^{\circ}$ with horizontal from ground. The magnitude of average velocity of particle in time interval $t=2 \,s$ to $t=6 \,s$ is ....... $m / s$ [Take $g=10 \,m / s ^2$ ]

Which of the following statements is true

Which law states that effect of pressure is same for all portion