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

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A carnot engine having an efficiency of110th 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 

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 t2C and the room temperature is t1C . The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be -

(a)t1t1-t2      (b) t1+273t1-t2

(c) t2+273t1-t2    (d) t1+t2t1+273

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

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

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 600K 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 1000K. 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: