Download App

Thermodynamics — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsThermodynamics3 Marks
Question
Why should a Carnot cycle have two isothermal two adiabatic processes?
✓

Answer

With two isothermal and two adiabatic processes, all reversible, the efficiency of the Carnot engine depends only on the temperatures of the hot and cold reservoirs.
[Note : This is not so in the Otto cycle and Diesel cycle.]

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

Explore more

More "Answer the following in Brief" from Thermodynamics→Thermodynamics — all question types→Physics STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Prove that a pipe of length $2 L$ open at both ends has the same fundamental frequency as a pipe of length $L$ closed at one end.
→
Prove that frequency of beats is equal to the difference between the frequencies of the two sounds notes giving rise to beats.
→
A coil has $1000$ turns, each of area $0.5 m ^2$. What is the magnetic moment of the coil when it carries a current of $1 \ mA$ ?
→
Define period or periodic time, frequency, amplitude and path length of simple harmonic motion (SHM).
→
State the postulates of Bohr’s atomic model.
→
Define the angular momentum of a particle.
→
Using the energy conservation, derive the expressions for the minimum speeds at different locations along a vertical circular motion controlled by gravity. Is zero speed possible at the uppermost point? Under what condition/s? Also prove that the difference between the extreme tensions (or normal forces) depends only upon the weight of the object.
→
Obtain an expression for path difference and fringe width of interference pattern in Young's double slit experiment. Show that the fringe width is same for consecutive bright and dark bands.
→
Calculate the kinetic energy
(i) per mole
(ii) per unit mass
(iii) per molecule of nitrogen at STP. [Molar mass of nitrogen $=28 \times 10^{-3} \mathrm{~kg} / \mathrm{mol}, \mathrm{R}=8.314$
$
\left.\mathrm{J} / \mathrm{mol} . \mathrm{K}, \mathrm{K}_{\mathrm{B}}=1.38 \times 10^{-23} \mathrm{~J} / \mathrm{K}\right]
$
→
What is photoelectric effect?
→