MCQ
Which statement is incorrect?
  • A
    Carnot cycle has the maximum efficiency in all cycles
  • B
    Carnot cycle is a reversible one
  • C
    Reversible cycle has more efficiency than an irreversible one
  • All reversible cycles have same efficiency

Answer

Correct option: D.
All reversible cycles have same efficiency
d
Efficiency of all reversible cycles depends upon temperature of source and sink which will be different.

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

Similar questions

A rectangular box has water in it. It is being pulled to the right with an acceleration $a$. Which of the following options shows the correct shape of water surface on it ?
A uniformly tapering vessel is filled with a liquid of density $900\ kgm^{-3}$. The force that acts on the base of the vessel due to the liquid is $($Take, $g = 10\ ms^{-2})$​​​​​​​​​​​​​​
Consider one mole of helium gas enclosed in a container at initial pressure $P_1$ and volume $V_1$. It expands isothermally to volume $4 V_1$. After this, the gas expands adiabatically and its volume becomes $32 V_1$. The work done by the gas during isothermal and adiabatic expansion processes are $W_{\text {iso }}$ and $W_{\text {adia, }}$ respectively. If the ratio $\frac{W_{\text {iso }}}{W_{\text {adia }}}=f \ln 2$, then $f$ is. . . . . . . .
A ball is rolled off the edge of a horizontal table at a speed of $4\, m/second$. It hits the ground after $0.4\, second$. Which statement given below is true
Which of the following statements is false for a particle moving in a circle with a constant angular speed
At any instant the velocity of a particle of mass $500\,g$ is $\left(2 t \hat{ i }+3 t ^2 \hat{ j }\right)\,ms ^{-1}$. If the force acting on the particle at $t=1 s$ is $(\hat{i}+x \hat{j}) N$. Then the value of $x$ will be:
Mercury does not wet glass, wood or iron because
The heat capacity of a body depends on:
  1. The heat given.
  2. The temperature raised.
  3. The mass of the body.
  4. The material of the body.
The graph shows the variation of velocity of a rocket with time. Then, the maximum height attained by the rocket is ...........$km$ :-
A boy throws balls into air at regular interval of $2$ second. The next ball is thrown when the velocity of first ball is zero. How high do the ball rise above his hand is ...... $m$ [Take $g=9.8 \,m / s ^2$ ]