Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 40

EASY

JEE Main

IMPORTANT

Earn 100

Molar heat capacity of an ideal gas, at constant volume, is $α R$ . If $R$ is gas constant, then $\frac{C_{p}}{C_{v}}$ will be

100% studentsanswered this correctly

Important Questions on Thermodynamics

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 41

Which of the following option is true for a reversible process?

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 42

In any reversible process, the entropy of system and surroundings will

MEDIUM

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 44

A heat engine operating between

40

degrees

C

and

380

degrees

C

has an efficiency

60 %

of that of a Carnot engine operating between the same temperatures. If the engine absorbs heat at a rate of

60 k W

, at what rate does it exhaust heat (in

k W

)? (Approximate the answer to the nearest integer.)

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 45

An ideal heat engine exhausting heat at

77 ° C

is to have a

30 %

efficiency. Find the temperature

(in ° C)

at which it must take heat.

MEDIUM

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 46

A Carnot engine operates between two reservoirs of temperatures

900 K

and

300 K .

The engine performs

1200 J

of work per cycle. The heat energy (in J) delivered by the engine to the low temperature reservoir, in a cycle, is

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 47

A Carnot engine has the same efficiency between (i)

100 K

and

500 K

, (ii)

T K

and

900 K

. The value of

T

is

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 48

The coefficient of performance of a carnot refrigerator working between

30 ° C

and

0 ° C

is

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 27

Entropy of the universe tends to be