Even carnot heat engine cannot give $100 %$ efficiency. Explain why
OR
can you design a heat engine of $100 %$ efficiency? Explain ypur answer.
OR
A heat engine with $100 %$ efficiency is only a theoretical possibility. Explain.

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The correct Answer is:The efficiency of a heat engine,
$η = 1 - \frac{T_{2}}{T_{1}}$
The efficiency will be $100 % or 1, if T_{2} = 0 K$
Since temperature equal to $0 K$ cannot be reached, a heat engine cannot have $100 %$ efficiency.

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Updated on:21/07/2023

Class 11 PHYSICS THERMODYNAMICS

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Knowledge Check

Question 1 - Select One
Even Carnot engine cannot give $100 %$ efficiency because we cannot
Aprevent radiation
Bfind ideal sources
Creach absolute zero temperature
Deliminate friction.
Question 1 - Select One
An ideal heat engine can be 100% efficient if its sink is at
A0K
B273K
C $0^{\circ} C$
D $0^{\circ} F$
Question 1 - Select One
Efficiency of a Carnot heat engine may be given as
A $\frac{w}{Q_{2}}$
B $1 - \frac{Q_{2}}{Q_{1}}$
C $1 - \frac{T_{1}}{T_{2}}$
DNone of these
Question 1 - Select One
Efficiency of Carnot engine is $100 %$ if
Asing is at $0^{\circ} C$
Bsink is at 0K
Csource is at $273^{\circ} C$
Dsource is at $100^{\circ} C$
Question 1 - Select One
In practise, all heat engines have efficiency less than that of a carnot engine because
ACarnot engine is irreversible
BA reversible process can never be attained in a real world
CIrreversible engine has higher efficiency than reversible engine
DEfficiency of carnot engine is always one
Question 1 - Select One
A fritionless heat engine can be 100% efficient only if its exhaust temperature is
AEqual to its input temperature
BLess than its input temperature
C0 K
D $0^{\circ} C$

Even carnot heat engine cannot give $100 %$ efficiency. Explain why
OR
can you design a heat engine of $100 %$ efficiency? Explain ypur answer.
OR
A heat engine with $100 %$ efficiency is only a theoretical possibility. Explain.

The correct Answer is:The efficiency of a heat engine,
$η = 1 - \frac{T_{2}}{T_{1}}$
The efficiency will be $100 % or 1, if T_{2} = 0 K$
Since temperature equal to $0 K$ cannot be reached, a heat engine cannot have $100 %$ efficiency.

Related Playlists

Knowledge Check

Even Carnot engine cannot give $100 %$ efficiency because we cannot

An ideal heat engine can be 100% efficient if its sink is at

Efficiency of a Carnot heat engine may be given as

Efficiency of Carnot engine is $100 %$ if

In practise, all heat engines have efficiency less than that of a carnot engine because

A fritionless heat engine can be 100% efficient only if its exhaust temperature is

Similar Questions

RESONANCE-KTG & THERMODYNAMICS-SECTION

Even carnot heat engine cannot give 100 % efficiency. Explain why OR can you design a heat engine of 100 % efficiency? Explain ypur answer. OR A heat engine with 100 % efficiency is only a theoretical possibility. Explain.

The correct Answer is:The efficiency of a heat engine, η = 1 - T 2 T 1 The efficiency will be 100 % or 1 , if T 2 = 0 K Since temperature equal to 0 K cannot be reached, a heat engine cannot have 100 % efficiency.

Related Playlists

Knowledge Check

Even Carnot engine cannot give 100% efficiency because we cannot

An ideal heat engine can be 100% efficient if its sink is at

Efficiency of a Carnot heat engine may be given as

Efficiency of Carnot engine is 100% if

In practise, all heat engines have efficiency less than that of a carnot engine because

A fritionless heat engine can be 100% efficient only if its exhaust temperature is

Similar Questions

RESONANCE-KTG & THERMODYNAMICS-SECTION

Even carnot heat engine cannot give $100 %$ efficiency. Explain why
OR
can you design a heat engine of $100 %$ efficiency? Explain ypur answer.
OR
A heat engine with $100 %$ efficiency is only a theoretical possibility. Explain.

The correct Answer is:The efficiency of a heat engine,
$η = 1 - \frac{T_{2}}{T_{1}}$
The efficiency will be $100 % or 1, if T_{2} = 0 K$
Since temperature equal to $0 K$ cannot be reached, a heat engine cannot have $100 %$ efficiency.

Even Carnot engine cannot give $100 %$ efficiency because we cannot

Efficiency of Carnot engine is $100 %$ if