AP EAMCET · PHYSICS · Thermodynamics
The efficiency of a Carnot heat engine is \(25 \%\) and the temperature of its source is \(127^{\circ} \mathrm{C}\). Without changing the temperature of the source, if absolute temperature of the sink is decreased by \(10 \%\), the efficiency of the engine is
- A \(27.5 \%\)
- B \(17.5 \%\)
- C \(32.5 \%\)
- D \(22.5 \%\)
Answer & Solution
Correct Answer
(C) \(32.5 \%\)
Step-by-step Solution
Detailed explanation
For car not engine, \(\eta=25 \%=0.25\)…
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 uniform metal bar of length \(10 \mathrm{~m}\) with a crack at its midpoint is clamped between two rigid supports. The bar buckles upward due to temperature rise of \(40^{\circ} \mathrm{C}\). If the coefficient of linear expansion of the metal is \(2.5 \times 10^{-6}{ }^{\circ} \mathrm{C}^{-1}\), the maximum displacement of the mid-point of the bar isAP EAMCET 2019 Medium
- Eight spherical rain drops of the same mass and radius are falling down with a terminal speed of \(6 \mathrm{~cm}-\mathrm{s}^{-1}\). If they coalesce to form one big drop, what will be the terminal speed of bigger drop? (Neglect the buoyancy of the air)AP EAMCET 2009 Easy
- A point charge of \(10^{-7} \mathrm{C}\) is situated at the centre of cube of \(1 \mathrm{~m}\) side. The electric flux through its surface isAP EAMCET 2020 Medium
- The amplitude of a wave, represented by displacement equation
\(y=\frac{1}{\sqrt{a}} \sin \omega t \pm \frac{1}{\sqrt{b}} \cos \omega t\) will beAP EAMCET 2023 Medium - Three point charges of each are kept at the vertices of an equilateral triangle of side If the system is supplied energy at the rate of the time taken to move one of the charges to the mid point of the line joining the other two charges isAP EAMCET 2019 Medium
- A light container having a diatomic gas enclosed within is moving with velocity \(v\). Mass of the gas is \(M\) and number of moles is \(n\). The kinetic energy of gas w.r.t. ground isAP EAMCET 2020 Medium
More PYQs from AP EAMCET
- The number of solutions of the equation when isAP EAMCET 2018 Medium
- If , thenAP EAMCET 2021 Medium
- If \(\operatorname{det}(\mathrm{AB})=(\operatorname{det} \mathrm{A})(\operatorname{det} \mathrm{B})\) and \(\mathrm{A}\) is a non-singular matrix of \(\operatorname{order} 3 \times 3\), then \(\operatorname{det}(\operatorname{adj} A)=\)AP EAMCET 2023 Easy
- Let \(\mathbf{u}, \mathbf{v}\) and \(\mathbf{w}\) be three vectors in \(R^3\). Then, any vector \(Z \in \mathbf{R}^3\) can be written as \(z=a \mathbf{u}+b \mathbf{v}+c \mathbf{w}\) for some scalars \(a, b\) and \(c\) if and only ifAP EAMCET 2020 Easy
- A coil of mean area and having turns is held with its plane perpendicular to a uniform field of . If the coil is turned through in second, then the average induced emf isAP EAMCET 2019 Medium
- The system \(2 x+3 y+z=5,3 x+y+5 z=7\) and \(x+4 y-2 z=3\) hasAP EAMCET 2015 Hard