Two strips of equal volume and length are joined together as shown in the diagram. What will happen when they are heated? Assume that the thermal coefficient of expansion of 1 is greater than that of 2.

Break rather than change length

Increase in length will be equal for both

Break rather than change length

What is the relation between coefficient of area expansion(A) and coefficient of volume expansion(B)?

and coefficient of volume expansion(B)?a) B = 1.5A

What is the value of coefficient of volume expansion for an ideal gas?

2*coefficient of linear expansion

1/3 * coefficient of linear expansion

A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a room that is dimly lit, then ___________

Both the pieces will look equally red

The blue piece will look blue and red will look as usual

Red looks brighter and blue looks ordinary blue

Blue shines like brighter red compared to the red pieces

Both the pieces will look equally red

A composite rod made of copper (1.8×10(-5) K(-1)) and steel (α=1.2×10(-5) K(-1)) is heated. Then ___________

It bends with copper on concave side

It bends with steel on concave side

It bends with copper on concave side

An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that ___________

At all times it is the darkest body

Initially, it is darkest body and at later times the brightest

At all times it is the darkest body

It cannot be distinguished at all times

Initially, it is the darkest body and at later it cannot be distinguished

Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1°C and it is defined under which of the following conditions?

From 98.5°C to 99.5°C at 760mm of Hg

From 14.5°C to 15.5°C at 760mm of Hg

From 98.5°C to 99.5°C at 760mm of Hg

From 13.5°C to 14.5°C at 76mm of Hg

From 3.5°C to 4.5°C at 76mm of Hg

A_COMPOSITE_ROD_MADE_OF_COPPER_(1.8‚ÄÖ√†√∂‚ÀÖ‚Â•10(-5)_K(-1))_AND_STEEL_(‚ÂÀ√≠¬¨¬±=1.2‚ÄÖ√†√∂‚ÀÖ‚Â•10(-5)_K(-1))_IS_HEATED._THEN?$#

It bends with copper on concave side

It bends with steel on concave side

It bends with copper on concave side

ON_A_HILLY_REGION,_WATER_BOILS_AT_95¬¨¬®‚ÄÖ√†√ªC._THE_TEMPERATURE_EXPRESSED_IN_FAHRENHEIT_IS?$#

20.3¬¨¬®‚Äö√†√ªF

A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a room that is dimly lit, then$

Both the pieces will look equally red

The blue piece will look blue and red will look as usual

Red looks brighter and blue looks ordinary blue

Blue shines like brighter red compared to the red pieces

Both the pieces will look equally red

Temperatures of two stars are in ratio 3:2. If wavelength of maximum intensity of first body is 4000 &sbquo;Äö√&dagger;√∂&sbquo;àö√±, what is corresponding wavelength of second body?$#

2000 ‚Äö√†√∂‚àö√±

9000 ‚Äö√†√∂‚àö√±

6000 ‚Äö√†√∂‚àö√±

2000 ‚Äö√†√∂‚àö√±

8000 ‚Äö√†√∂‚àö√±

An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that

At all times it is the darkest body

Initially, it is darkest body and at later times the brightest

At all times it is the darkest body

It cannot be distinguished at all times

Initially, it is the darkest body and at later it cannot be distinguished

540g of ice at 0¬¨¬®‚Äö√†√ªC is mixed with 540g of water at 80¬¨¬®‚Äö√†√ªC. The final temperature of mixture is$

Less than 0¬¨¬®‚Äö√†√ªC

Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1¬¨¬®‚Äö√†√ªC and it is defined under which of the following conditions?$

From 98.5¬¨¬®‚Äö√†√ªC to 99.5¬¨¬®‚Äö√†√ªC at 760mm of Hg

From 14.5¬¨¬®‚Äö√†√ªC to 15.5¬¨¬®‚Äö√†√ªC at 760mm of Hg

From 98.5¬¨¬®‚Äö√†√ªC to 99.5¬¨¬®‚Äö√†√ªC at 760mm of Hg

From 13.5¬¨¬®‚Äö√†√ªC to 14.5¬¨¬®‚Äö√†√ªC at 76mm of Hg

From 3.5¬¨¬®‚Äö√†√ªC to 4.5¬¨¬®‚Äö√†√ªC at 76mm of Hg

33 + Mcqs in Thermal Expansion in Engineering Physics Page 1 McqOptions

1.	Two strips of equal volume and length are joined together as shown in the diagram. What will happen when they are heated? Assume that the thermal coefficient of expansion of 1 is greater than that of 2.
A.	Increase in length will be equal for both
B.	Bend with 1 on convex side
C.	Break rather than change length
D.	Bend with 2 on convex side
Answer» C. Break rather than change length

Discussion

2.	A rod having α = 110-5per °C and length of 70cm has one of its end rigidly connected to another rod of length 1m and α= 0.510-5per °C. Find the new length of the two joined rods when their temperature is increased by 30℃.
A.	170.021cm
B.	169.021cm
C.	171.031cm
D.	170.031cm
Answer» B. 169.021cm

Discussion

3.	What is the unit of coefficient of area expansion?
A.	per °C
B.	°C
C.	per (°C)2
D.	(°C)2
Answer» B. °C

Discussion

4.	A uniform metal sheet has a hole in its centre. What happens to hole when the sheet is uniformly heated?
A.	Its size increases
B.	Its size decreases
C.	It changes shape
D.	Remains the same size
Answer» B. Its size decreases

Discussion

5.	What is the value of coefficient of area expansion for a sphere? Assume coefficient of linear expansion is α.
A.	2α
B.	α
C.	3α
D.	α/2
Answer» B. α

Discussion

6.	A rod is lying on the ground with both ends free. It has a length of 1m. Coefficient of linear expansion equal to 1.1*10-5per °C. Calculate the strain when the change in temperature is 10K.
A.	11*10-5
B.	1.1*10-5
C.	0
D.	311.3*10-5
Answer» D. 311.3*10-5

Discussion

7.	What is the relation between coefficient of area expansion(A) and coefficient of volume expansion(B)?
A.	and coefficient of volume expansion(B)?a) B = 1.5A
B.	A = 1.5B
C.	A = 3B
D.	B = 3A
Answer» B. A = 1.5B

Discussion

8.	What is the value of coefficient of volume expansion for an ideal gas?
A.	(ΔV/V)/Δ T
B.	2*coefficient of linear expansion
C.	1/3 * coefficient of linear expansion
D.	(V/ΔV)/ Δ T
Answer» B. 2*coefficient of linear expansion

Discussion

9.	The value of coefficient of thermal expansion is always the same for a material. True or False?
A.	True
B.	False
Answer» C.

Discussion

10.	It is possible that with decrease in temperature volume may increase. True or False?
A.	True
B.	False
Answer» B. False

Discussion

11.	A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a room that is dimly lit, then ___________
A.	The blue piece will look blue and red will look as usual
B.	Red looks brighter and blue looks ordinary blue
C.	Blue shines like brighter red compared to the red pieces
D.	Both the pieces will look equally red
Answer» D. Both the pieces will look equally red

Discussion

12.	Temperatures of two stars are in ratio 3:2. If wavelength of maximum intensity of first body is 4000 Å, what is corresponding wavelength of second body?
A.	9000 Å
B.	6000 Å
C.	2000 Å
D.	8000 Å
Answer» C. 2000 Å

Discussion

13.	A composite rod made of copper (1.8×10(-5) K(-1)) and steel (α=1.2×10(-5) K(-1)) is heated. Then ___________
A.	It bends with steel on concave side
B.	It bends with copper on concave side
C.	It does not expand
D.	Data is insufficient
Answer» B. It bends with copper on concave side

Discussion

14.	On a hilly region, water boils at 95°C. What is the temperature expressed in Fahrenheit?
A.	100°F
B.	203°F
C.	150°F
D.	20.3°F
Answer» C. 150°F

Discussion

15.	If the sun were to increase in temperature from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously, will be ___________
A.	4
B.	16
C.	32
D.	64
Answer» E.

Discussion

16.	An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that ___________
A.	Initially, it is darkest body and at later times the brightest
B.	At all times it is the darkest body
C.	It cannot be distinguished at all times
D.	Initially, it is the darkest body and at later it cannot be distinguished
Answer» B. At all times it is the darkest body

Discussion

17.	540g of ice at 0°C is mixed with 540g of water at 80°C. What is the final temperature of the mixture?
A.	0°C
B.	40°C
C.	80°C
D.	Less than 0°C
Answer» B. 40°C

Discussion

18.	Compared to burn due to air at 100°C, a burn due to steam at 100°C is ___________
A.	More dangerous
B.	Less dangerous
C.	Equally dangerous
D.	Not dangerous
Answer» B. Less dangerous

Discussion

19.	Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1°C and it is defined under which of the following conditions?
A.	From 14.5°C to 15.5°C at 760mm of Hg
B.	From 98.5°C to 99.5°C at 760mm of Hg
C.	From 13.5°C to 14.5°C at 76mm of Hg
D.	From 3.5°C to 4.5°C at 76mm of Hg
Answer» B. From 98.5°C to 99.5°C at 760mm of Hg

Discussion

20.	The thermometer bulb should have ___________
A.	High heat capacity
B.	No heat capacity
C.	Small heat capacity
D.	Varying heat capacity
Answer» D. Varying heat capacity

Discussion

21.	A faulty thermometer has its fixed points marked as 5° and 95°. The temperature of a body as measured by the faulty thermometer is 59°. Find the correct temperature of the body on a Celsius scale.
A.	60°C
B.	40°C
C.	20°C
D.	0°C
Answer» B. 40°C

Discussion

22.	A_COMPOSITE_ROD_MADE_OF_COPPER_(1.8‚ÄÖ√†√∂‚ÀÖ‚Â•10^(-5)_K^(-1))_AND_STEEL_(‚ÂÀ√≠¬¨¬±=1.2‚ÄÖ√†√∂‚ÀÖ‚Â•10^(-5)_K^(-1))_IS_HEATED._THEN?$#
A.	It bends with steel on concave side
B.	It bends with copper on concave side
C.	It does not expand
D.	Data is insufficient
Answer» B. It bends with copper on concave side

Discussion

23.	ON_A_HILLY_REGION,_WATER_BOILS_AT_95¬¨¬®‚ÄÖ√†√ªC._THE_TEMPERATURE_EXPRESSED_IN_FAHRENHEIT_IS?$#
A.	100¬¨¬®‚Äö√†√ªF
B.	203¬¨¬®‚Äö√†√ªF
C.	150¬¨¬®‚Äö√†√ªF
D.	20.3¬¨¬®‚Äö√†√ªF
Answer» C. 150¬¨¬®‚Äö√†√ªF

Discussion

24.	A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a room that is dimly lit, then$
A.	The blue piece will look blue and red will look as usual
B.	Red looks brighter and blue looks ordinary blue
C.	Blue shines like brighter red compared to the red pieces
D.	Both the pieces will look equally red
Answer» D. Both the pieces will look equally red

Discussion

25.	Temperatures of two stars are in ratio 3:2. If wavelength of maximum intensity of first body is 4000 ‚Äö√†√∂‚àö√±, what is corresponding wavelength of second body?$#
A.	9000 ‚Äö√†√∂‚àö√±
B.	6000 ‚Äö√†√∂‚àö√±
C.	2000 ‚Äö√†√∂‚àö√±
D.	8000 ‚Äö√†√∂‚àö√±
Answer» C. 2000 ‚Äö√†√∂‚àö√±

Discussion

26.	If the sun were to increase in temperature from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously, will b?
A.	4
B.	16
C.	32
D.	64
Answer» E.

Discussion

27.	An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that
A.	Initially, it is darkest body and at later times the brightest
B.	At all times it is the darkest body
C.	It cannot be distinguished at all times
D.	Initially, it is the darkest body and at later it cannot be distinguished
Answer» B. At all times it is the darkest body

Discussion

28.	540g of ice at 0¬¨¬®‚Äö√†√ªC is mixed with 540g of water at 80¬¨¬®‚Äö√†√ªC. The final temperature of mixture is$
A.	0¬¨¬®‚Äö√†√ªC
B.	40¬¨¬®‚Äö√†√ªC
C.	80¬¨¬®‚Äö√†√ªC
D.	Less than 0¬¨¬®‚Äö√†√ªC
Answer» B. 40¬¨¬®‚Äö√†√ªC

Discussion

29.	Compared to burn due to air at 100¬¨¬®‚Äö√†√ªC, a burn due to steam at 100¬¨¬®‚Äö√†√ªC is$
A.	More dangerous
B.	Less dangerous
C.	Equally dangerous
D.	Not dangerous
Answer» B. Less dangerous

Discussion

30.	Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1¬¨¬®‚Äö√†√ªC and it is defined under which of the following conditions?$
A.	From 14.5¬¨¬®‚Äö√†√ªC to 15.5¬¨¬®‚Äö√†√ªC at 760mm of Hg
B.	From 98.5¬¨¬®‚Äö√†√ªC to 99.5¬¨¬®‚Äö√†√ªC at 760mm of Hg
C.	From 13.5¬¨¬®‚Äö√†√ªC to 14.5¬¨¬®‚Äö√†√ªC at 76mm of Hg
D.	From 3.5¬¨¬®‚Äö√†√ªC to 4.5¬¨¬®‚Äö√†√ªC at 76mm of Hg
Answer» B. From 98.5¬¨¬®‚Äö√†√ªC to 99.5¬¨¬®‚Äö√†√ªC at 760mm of Hg

Discussion

31.	The thermometer bulb should have
A.	High heat capacity
B.	No heat capacity
C.	Small heat capacity
D.	Varying heat capacity
Answer» D. Varying heat capacity

Discussion

32.	Temperature is a microscopic concept.
A.	True
B.	False
Answer» C.

Discussion

33.	A faulty thermometer has its fixed points marked as 5¬¨¬®‚Äö√†√ª and 95¬¨¬®‚Äö√†√ª. The temperature of a body as measured by the faulty thermometer is 59¬¨¬®‚Äö√†√ª. Find the correct temperature of the body on a Celsius scale.
A.	60¬¨¬®‚Äö√†√ªC
B.	40¬¨¬®‚Äö√†√ªC
C.	20¬¨¬®‚Äö√†√ªC
D.	0¬¨¬®‚Äö√†√ªC
Answer» B. 40¬¨¬®‚Äö√†√ªC

Discussion

Explore topic-wise MCQs in Engineering Physics.

Two strips of equal volume and length are joined together as shown in the diagram. What will happen when they are heated? Assume that the thermal coefficient of expansion of 1 is greater than that of 2.

A rod having α = 1*10-5per °C and length of 70cm has one of its end rigidly connected to another rod of length 1m and α= 0.5*10-5per °C. Find the new length of the two joined rods when their temperature is increased by 30℃.

What is the unit of coefficient of area expansion?

A uniform metal sheet has a hole in its centre. What happens to hole when the sheet is uniformly heated?

What is the value of coefficient of area expansion for a sphere? Assume coefficient of linear expansion is α.

A rod is lying on the ground with both ends free. It has a length of 1m. Coefficient of linear expansion equal to 1.1*10-5per °C. Calculate the strain when the change in temperature is 10K.

What is the relation between coefficient of area expansion(A) and coefficient of volume expansion(B)?

What is the value of coefficient of volume expansion for an ideal gas?

The value of coefficient of thermal expansion is always the same for a material. True or False?

It is possible that with decrease in temperature volume may increase. True or False?

A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a room that is dimly lit, then ___________

Temperatures of two stars are in ratio 3:2. If wavelength of maximum intensity of first body is 4000 Å, what is corresponding wavelength of second body?

A composite rod made of copper (1.8×10(-5) K(-1)) and steel (α=1.2×10(-5) K(-1)) is heated. Then ___________

On a hilly region, water boils at 95°C. What is the temperature expressed in Fahrenheit?

If the sun were to increase in temperature from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously, will be ___________

An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that ___________

540g of ice at 0°C is mixed with 540g of water at 80°C. What is the final temperature of the mixture?

Compared to burn due to air at 100°C, a burn due to steam at 100°C is ___________

Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1°C and it is defined under which of the following conditions?

The thermometer bulb should have ___________

A faulty thermometer has its fixed points marked as 5° and 95°. The temperature of a body as measured by the faulty thermometer is 59°. Find the correct temperature of the body on a Celsius scale.

A_COMPOSITE_ROD_MADE_OF_COPPER_(1.8‚ÄÖ√†√∂‚ÀÖ‚Â•10(-5)_K(-1))_AND_STEEL_(‚ÂÀ√≠¬¨¬±=1.2‚ÄÖ√†√∂‚ÀÖ‚Â•10(-5)_K(-1))_IS_HEATED._THEN?$#

ON_A_HILLY_REGION,_WATER_BOILS_AT_95¬¨¬®‚ÄÖ√†√ªC._THE_TEMPERATURE_EXPRESSED_IN_FAHRENHEIT_IS?$#

A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a room that is dimly lit, then$

Temperatures of two stars are in ratio 3:2. If wavelength of maximum intensity of first body is 4000 ‚Äö√†√∂‚àö√±, what is corresponding wavelength of second body?$#

If the sun were to increase in temperature from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously, will b?

An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that

540g of ice at 0¬¨¬®‚Äö√†√ªC is mixed with 540g of water at 80¬¨¬®‚Äö√†√ªC. The final temperature of mixture is$

Compared to burn due to air at 100¬¨¬®‚Äö√†√ªC, a burn due to steam at 100¬¨¬®‚Äö√†√ªC is$

Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1¬¨¬®‚Äö√†√ªC and it is defined under which of the following conditions?$

The thermometer bulb should have

Temperature is a microscopic concept.

A faulty thermometer has its fixed points marked as 5¬¨¬®‚Äö√†√ª and 95¬¨¬®‚Äö√†√ª. The temperature of a body as measured by the faulty thermometer is 59¬¨¬®‚Äö√†√ª. Find the correct temperature of the body on a Celsius scale.

A rod having α = 110-5per °C and length of 70cm has one of its end rigidly connected to another rod of length 1m and α= 0.510-5per °C. Find the new length of the two joined rods when their temperature is increased by 30℃.

A_COMPOSITE_ROD_MADE_OF_COPPER_(1.8‚ÄÖ√†√∂‚ÀÖ‚Â•10^(-5)_K^(-1))_AND_STEEL_(‚ÂÀ√≠¬¨¬±=1.2‚ÄÖ√†√∂‚ÀÖ‚Â•10^(-5)_K^(-1))_IS_HEATED._THEN?$#