MCQ
For adiabatic process, wrong statement is
- A$dQ = 0$
- B$dU = - dW$
- C$Q =$ constant
- ✓Entropy is not constant
✓
Answer
Correct option: D.
Entropy is not constant
d
(d) For adiabatic process no heat is transferred hence $\mathrm{d} \mathrm{Q}=0$
(d) For adiabatic process no heat is transferred hence $\mathrm{d} \mathrm{Q}=0$
$\mathrm{du}=-\mathrm{d} \mathrm{w}$
As $\quad \mathrm{dQ}=0$ means $\mathrm{Q}$ is constant
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
An ac source is connected to a capacitor $C$. Due to decrease in its operating frequency :
→Which of the following is true
A circular disc of radius $R$ and thickness $\frac{R}{6}$ has moment of inertia I about an axis passing through its centre and perpendicular to its plane. It is melted and recasted into a solid sphere. The moment of inertia of the sphere about its diameter as axis of rotation is
→The Cauchy’s dispersion formula is
A magnet of length $0.1 \,m $ and pole strength ${10^{ - 4}}\,A.m.$ is kept in a magnetic field of $30\,Wb/{m^2}$ at an angle $30°.$ The couple acting on it is ……… $ \times {10^{ - 4}}\,Nm.$
→Two identical coaxial circular loops carry a current $i$ each circulating in the same direction. If the loops approach each other
→A taut string at both ends vibrates in its $n^{th}$ overtone. The distance between adjacent Node and Antinode is found to be $'d'$. If the length of the string is $L,$ then
→The speed of sound in oxygen $\left( O _{2}\right)$ at a certain temperature is $460 \;ms ^{-1}$. The speed of sound in helium $(He)$ at the same temperature will be (asume both gases to be ideal)
→A beaker is filled in with water is accelerated $a $ $m/s^2$ in $+x$ direction. The surface of water shall make on angle
→A wire has a non-uniform cross-section as shown in figure.A steady current flows through it. The drift speed of electrons at points $P$ and $q$ is $v_P$ and $v_Q$.
→