An ideal gas undergoes cyclic process as shown in density pressur… - Vidyadip

MCQ

An ideal gas undergoes cyclic process as shown in density pressure graph. During the process $AB$ the work done $|W_{AB}| = 70\,J$ . During the process $BC$, the gas absorbs $150\,J$ of heat. During the process $CA$ , gas undergoes expansion and does $210\,J$ of work

A
The efficiency of cyclic process is $33\%$
✓
The efficiency of cyclic process is $66\%$
C
The process $CA$ is adiabatic
D
The process $BC$ is isothermal

✓

Answer

Correct option: B.

The efficiency of cyclic process is $66\%$

b

	$Q$	$\Delta U$	$W$
$AB$	$-70$	$0$	$-70$
$BC$	$150$	$150$	$0$
$CA$	$60$	$-150$	$210$

$\eta=\frac{140}{210} \times 100 \%=60 \%$

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→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

The equation of a particle executing simple harmonic motion is given by $x =\sin \pi\left( t +\frac{1}{3}\right) m$. At $t =1 \,s$, the speed of particle will be .......... $cm s ^{-1}$ (Given : $\pi=3.14$ )

Two billiard balls A and B, each of mass 50g and moving in opposite directions with speed of 5m s^–1 each, collide and rebound with the same speed. If the collision lasts for 10^–3s, which of the following statements are true?

The period of revolution of planet $A$ around the sun is $8$ times that of $B$. The distance of $A$ from the sun is how many times greater than that of $B$ from the sun

A clock has $75 \mathrm{~cm}, 60 \mathrm{~cm}$ long second hand and minute hand respectively. In $30$ minutes duration the tip of second hand will travel $x$ distance more than the tip of minute hand. The value of $x$ in meter is nearly (Take $\pi=3.14$ ) :

If $a$ cylinder is rolling down the incline with sliding.

To raise the temperature of a certain mass of gas by $50^{\circ} C$ at a constant pressure, $160$ calories of heat is required. When the same mass of gas is cooled by $100^{\circ} C$ at constant volume, $240$ calories of heat is released. How many degrees of freedom does each molecule of this gas have (assume gas to be ideal) $?$

Two springs of force constants $300\, N / m$ (Spring $A$) and $400$ $N / m$ (Spring $B$ ) are joined together in series. The combination is compressed by $8.75\, cm .$ The ratio of energy stored in $A$ and $B$ is $\frac{E_{A}}{E_{B}} .$ Then $\frac{E_{A}}{E_{B}}$ is equal to

If a piece of metal is heated to temperature $\theta$ and then allowed to cool in a room which is at temperature $\theta_0$, the graph between the temperature $T$ of the metal and time t will be closest to

Three particles of equal mass $m$ are situated at the vertices of an equilateral triangle of side $l$. They are moving in a circle in influence of their mutual gravitational interaction. Then their time period of revolution is directly proportional to

At constant temperature on increasing the pressure of a gas by $5\%$ will decrease its volume by ..... $\%$