KCET · Physics · Thermodynamics
A thermodynamic system undergoes a cyclic process \( A B C \) as shown in the diagram. The work done by the system per cycle is
- A \( -750 \mathrm{~J} \)
- B \( 750 \mathrm{~J} \)
- C \( 1250 \mathrm{~J} \)
- D \( -1250 \mathrm{~J} \)
Answer & Solution
Correct Answer
(A) \( -750 \mathrm{~J} \)
Step-by-step Solution
Detailed explanation
(A)
Work done \( =p \times \Delta v \)
Work done = Area of triangle ABC
\( \therefore W=\frac{1}{2}(10-5) \times(100-400) \)
\( =\frac{5}{2} \times(-300)=-750 \mathrm{~J} \)
The negative sign means the work is done by the system.
Work done \( =p \times \Delta v \)
Work done = Area of triangle ABC
\( \therefore W=\frac{1}{2}(10-5) \times(100-400) \)
\( =\frac{5}{2} \times(-300)=-750 \mathrm{~J} \)
The negative sign means the work is done by the system.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A parallel plate capacitor with air as the dielectric has capacitance \(C\). A slab of dielectric constant \(K\) and having the same thickness as the separation between the plates is introduced so as to fill one-fourth of the capacitor as shown in the figure. The new capacitance will be
KCET 2007 Medium - The value of acceleration due to gravity at adepth of \( 1600 \mathrm{~km} \) is equal to:
[Radius of earth \( =6400 \mathrm{~km} \) ]KCET 2017 Medium - Light from two coherent sources of the same amplitude \(A\) and wavelength \(\lambda\) illuminates the screen. The intensity of the central maximum is \(I_{0}\). If the sources were incoherent, the intensity at the same point will beKCET 2007 Medium
- The natural logarithm of the activity \(R\) of a radioactive sample varies with time \(t\) as shown. At \(t=0\), there are \(N_0\) undecayed nuclei. Then, \(N_0\) is equal to [Take \(e^2=7.5\) ]
KCET 2024 Easy - The surface temperature of the sun which has maximum energy emission at \(500 \mathrm{~nm}\) is \(6000 \mathrm{~K}\). The temperature of a star which has maximum energy emission at \(400 \mathrm{~nm}\) will beKCET 2007 Easy
- A solid sphere of mass \(m\) rolls down an inclined plane without slipping, starting from rest at the top of an inclined plane. The linear speed of the sphere at the bottom of the inclined plane is \(v\). The kinetic energy of the sphere at the bottom isKCET 2011 Hard
More PYQs from KCET
- Evaluate \( \left|\begin{array}{cc}\cos 15 & \sin 15 \\ \sin 75 & \cos 75\end{array}\right| \)KCET 2015 Medium
- If \(1+\sin x+\sin ^{2} x+\ldots\) upto \(\infty=4+2 \sqrt{3}\), \(0 < x < \pi\) and \(x \neq \frac{\pi}{2}\), then \(x\) is equal toKCET 2009 Easy
- The distance of the point \( (-2,4,-5) \) from the line
\( \frac{x+3}{3}=\frac{y-4}{5}=\frac{z+8}{6} \) isKCET 2017 Easy - If \(\mathrm{x} \neq \mathrm{n} \pi, \mathrm{x} \neq(2 \mathrm{n}+1) \frac{\pi}{2}, \mathrm{n} \in \mathrm{Z}, \quad\) then \(\frac{\sin ^{-1}(\cos x)+\cos ^{-1}(\sin x)}{\tan ^{-1}(\cot x)+\cot ^{-1}(\tan x)}\) isKCET 2010 Hard
- For the reaction, \(A(g)+B(g) \rightleftharpoons C(g)+D(g) ; \Delta H=Q \mathrm{~kJ}\)
The equilibrium constant cannot be disturbed byKCET 2021 Easy - The last element of the \(p\)-block in 6th period is represented by the outer most electronic configuration.KCET 2020 Easy