AP EAMCET · PHYSICS · Thermodynamics
On tripling the absolute temperature of the source, the efficiency of a Carnot's heat engine becomes double that of the initial efficiency. Then the initial efficiency of the engine is _________ .
- A \(20 \%\)
- B \(50 \%\)
- C \(60 \%\)
- D \(40 \%\)
Answer & Solution
Correct Answer
(D) \(40 \%\)
Step-by-step Solution
Detailed explanation
No solution. Refer to answer key.
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
- Frequencies in the UHF range normally propagate by means ofAP EAMCET 2022 Easy
- If \(C, R, L\) and \(I\) denote capacity, resistance, inductance and electric current respectively, the quantities having the same dimensions of time are :
(1) \(C R\)
(2) \(\frac{L}{R}\)
(3) \(\sqrt{L C}\)
(4) \(L I^2\)AP EAMCET 2006 Easy - A light ray of wavelength \(\lambda\) is passing through a pin hole of diameter \(D\) and the effect is observed on a screen placed at a distance \(L\) from the pin hole. The approximations of geometrical optics are applicable, ifAP EAMCET 2005 Medium
- The temperature of water of mass 100 g is rasied from \(24^{\circ} \mathrm{C}\) to \(90^{\circ} \mathrm{C}\) by adding steam to it. The mass of the steam added is
(Latent heat of steam \(=540 \mathrm{cal} \mathrm{g}^{-1}\) and specific heat capacity of water \(=1 \mathrm{cal} \mathrm{g}^{-1}{ }^{\circ} \mathrm{C}^{-1}\) )AP EAMCET 2025 Medium - For a prism, the angle of the prism is \(60^{\circ}\) and the refractive index is \(\sqrt{\frac{7}{3}}\). The minimum possible angle of incidence so that the light ray is refracted from the second surface isAP EAMCET 2018 Easy
- If the values of the temperature of a body in Fahrenheit and Celcius scales are in the ratio of \(13: 5\), then the temperature of the body isAP EAMCET 2025 Easy
More PYQs from AP EAMCET
- If \(n\) is a positive integer, then \((1+i \sqrt{3})^n+(1-i \sqrt{3})^n\) is equal toAP EAMCET 2021 Medium
- When bauxite powder is mixed with coke and reacted with nitrogen at \(2075 \mathrm{~K}\), carbon monoxide and \(X\) are formed. What is the gas formed when \(X\) is reacted with water?AP EAMCET 2002 Medium
- The ratios of lengths, areas of cross-section and Young's modulii of steel to that of brass wires shown in the figure are \(a, b\) and \(c\) respectively. The ratio of increase in the lengths of brass to that of steel wires is [Assume that the masses of steel and brass wires are negligible]
AP EAMCET 2017 Hard - The degree of the polynomial \(\left(x+\sqrt{x^4-1}\right)^9+\left(x-\sqrt{x^4-1}\right)^9\) isAP EAMCET 2023 Easy
- Which of the following statements are correct?
molecule is very reactive because of angular strain.
The basicity of is .
In gas phase, all of have same bond length.
In solid state, exists as an ionic solid, in which anion has octahedral and cation has tetrahedral shape.AP EAMCET 2018 Easy - If \(\log _{27}\left(\log _3 x\right)=\frac{1}{3}\), then the value of \(x\) isAP EAMCET 2004 Easy