Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

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Complete Question Bank

Difficulty Level:

A carnot engine having an efficiency of$\frac{1}{10}$th of heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is -

(a) 1 J

(b) 90 J

(c) 99 J

(d0 100 J

NEET - 2017

Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

To view Explanation, Please buy any of the course from below.

Complete Question Bank + Test Series

Complete Question Bank

Difficulty Level:

The temperature inside a refrigerator is ${{t}_{2}}^{\circ}C$and the room temperature is ${{t}_{1}}^{\circ}C$. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be -

(a)$\frac{{t}_{1}}{{t}_{1}-{t}_{2}}$ (b) $\frac{{t}_{1}+273}{{t}_{1}-{t}_{2}}$

(c) $\frac{{t}_{2}+273}{{t}_{1}-{t}_{2}}$ (d) $\frac{{t}_{1}+{t}_{2}}{{t}_{1}+273}$

NEET - 2016

Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

To view Explanation, Please buy any of the course from below.

Complete Question Bank + Test Series

Complete Question Bank

Difficulty Level:

A refrigerator works between 4°C and 30°C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is (Take, 1 cal = 4.2 Joules)

(a)23.65W

(b)236.5W

(c)2365W

(d)2.365W

NEET - 2016

Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

To view Explanation, Please buy any of the course from below.

Complete Question Bank + Test Series

Complete Question Bank

Difficulty Level:

The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20°C, the temperature of the surroundings to which it rejects heat is

(a)31°C

(b)41°C

(c)11°C

(d)21°C

NEET - 2015

Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

To view Explanation, Please buy any of the course from below.

Complete Question Bank + Test Series

Complete Question Bank

Difficulty Level:

A Carnot engine working between 300 *K* and 600*K* has work output of 800 *J* per cycle. What is amount of heat energy supplied to the engine from source per cycle ?

(1) 1800 *J*/*cycle*

(2) 1000 *J*/*cycle*

(3) 2000 *J*/*cycle*

(4) 1600 *J*/*cycle*

Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

To view Explanation, Please buy any of the course from below.

Complete Question Bank + Test Series

Complete Question Bank

Difficulty Level:

If the door of a refrigerator is kept open, then which of the following is true ?

(1) Room is cooled

(2) Room is heated

(3) Room is either cooled or heated

(4) Room is neither cooled nor heated

Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

To view Explanation, Please buy any of the course from below.

Complete Question Bank + Test Series

Complete Question Bank

Difficulty Level:

A Carnot's engine used first an ideal monoatomic gas then an ideal diatomic gas. If the source and sink temperature are 411°*C* and 69°*C* respectively and the engine extracts 1000 *J* of heat in each cycle, then area enclosed by the *PV* diagram is -

(1) 100 *J*

(2) 300 *J *

(3) 500 *J*

(4) 700 *J *

Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

To view Explanation, Please buy any of the course from below.

Complete Question Bank + Test Series

Complete Question Bank

Difficulty Level:

The temperature of sink of Carnot engine is 27°*C*. Efficiency of engine is 25%. Then temperature of source is -

(1) 227°*C*

(2) 327°*C*

(3) 127°*C*

(4) 27°*C*

Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

To view Explanation, Please buy any of the course from below.

Complete Question Bank + Test Series

Complete Question Bank

Difficulty Level:

The temperature of reservoir of Carnot's engine operating with an efficiency of 70% is 1000*K*. The temperature of its sink is -

(1) 300 *K*

(2) 400 *K *

(3) 500 *K*

(4) 700 *K *

Concept Videos :-

#48 | Introduction to Heat Engine

#49 | Solved Example: 23

#50 | Refrigerator

#52 | Carnot Engine

#53 | Carnot Cycle

#54 | Solved Example: 24

#55 | Solved Example: 25

Concept Questions :-

Heat engine and refrigerator

To view Explanation, Please buy any of the course from below.

Complete Question Bank + Test Series

Complete Question Bank

Difficulty Level: