Assertion: Good conductors of heat are also good conductors of electricity and vice-versa.Reasons: Mainly electrons are responsible for these conductors.

Both assertion and reason are true but the reason is not a correct explanation of the assertion

Both assertion and reason are true and the reason is the correct explanation of the assertion

Both assertion and reason are true but the reason is not a correct explanation of the assertion

Assertion is true but the reason is false

Both assertion and reason are false

A spherical body of area A and emissivity e = 0.6 is kept inside a perfectly black body. Energy radiated per second by the body at temperature T is

1.0 ‚âà√¨‚àö√¢AT4

0.8 ‚âà√¨‚àö√¢AT4

0.6 ‚âà√¨‚àö√¢AT4

1.0 ‚âà√¨‚àö√¢AT4

Assertion: Good conductors of heat are also good conductors of electricity and vice-versa

Both assertion and reason are true and the reason is the correct explanation of the assertion

Both assertion and reason are true but the reason is not a correct explanation of the assertion

24 + Mcqs in Temperature Specific Heat in Engineering Physics Page 1 McqOptions

1.	A spherical body of area A and emissivity e = 0.6 is kept inside a perfectly black body. Energy radiated per second by the body at temperature T is ___________
A.	0.4σAT4
B.	0.8 σAT4
C.	0.6 σAT4
D.	1.0 σAT4
Answer» D. 1.0 σAT4

Discussion

2.	Gas thermometers are more sensitive than a mercury thermometer.
A.	True
B.	False
Answer» B. False

Discussion

3.	A black body is at 727°C. It emits energy at a rate, which is proportional to ___________
A.	(727)2
B.	(1000)2
C.	(727)4
D.	(1000)4
Answer» E.

Discussion

4.	A beaker full of hot water is kept in a room. If it cools from 80°C to 75°C in t1 minutes, from 75°C to 70°C in t2 minutes and from 70°C to 65°C in t3 minutes, then ___________
A.	t1=t2=t3
B.	t1 < t2 = t3
C.	t1 < t2 < t3
D.	t1 > t2 > t3
Answer» D. t1 > t2 > t3

Discussion

5.	If 1g of steam is mixed with 1g of ice, what is the resultant temperature of the mixture?
A.	270°
B.	230°
C.	100°
D.	50°
Answer» D. 50°

Discussion

6.	A centigrade and Fahrenheit thermometers are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140°. What is the fall in temperature registered by the centigrade thermometer?
A.	80°C
B.	60°C
C.	360°C
D.	30°C
Answer» D. 30°C

Discussion

7.	Assertion: Good conductors of heat are also good conductors of electricity and vice-versa.Reasons: Mainly electrons are responsible for these conductors.
A.	Both assertion and reason are true and the reason is the correct explanation of the assertion
B.	Both assertion and reason are true but the reason is not a correct explanation of the assertion
C.	Assertion is true but the reason is false
D.	Both assertion and reason are false
Answer» B. Both assertion and reason are true but the reason is not a correct explanation of the assertion

Discussion

8.	On increasing the temperature of a substance gradually, its colour becomes ___________
A.	Red
B.	Green
C.	Yellow
D.	White
Answer» D. White

Discussion

9.	A black body at a high temperature T K radiates energy at the rate of E Wm-2. When the temperature falls to T/2 K, the radiated energy will be ___________
A.	E/4
B.	E/2
C.	2E
D.	E/16
Answer» E.

Discussion

10.	The bulb of one thermometer is spherical, while that of other is cylindrical. If both of them have an equal amount of mercury, which one will respond quickly to the temperature?
A.	Spherical
B.	Cylindrical
C.	Elliptical
D.	Circle
Answer» C. Elliptical

Discussion

11.	A constant pressure air thermometer gave a reading of 47.5 units of volume, when immersed in ice-cold water, and 67 units in a boiling liquid. What is the boiling point of the liquid?
A.	100°C
B.	112°C
C.	125°C
D.	135°C
Answer» C. 125°C

Discussion

12.	A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant, is known as ___________
A.	Latent heat
B.	Sublimation
C.	Hoar frost
D.	Latent heat of fusion
Answer» E.

Discussion

13.	A_BEAKER_FULL_OF_HOT_WATER_IS_KEPT_IN_A_ROOM._IF_IT_COOLS_FROM_80¬¨¬®‚ÄÖ√†√ªC_TO_75¬¨¬®‚ÄÖ√†√ªC_IN_T₁_MINUTES,_FROM_75¬¨¬®‚ÄÖ√†√ªC_TO_70¬¨¬®‚ÄÖ√†√ªC_IN_T₂_MINUTES_AND_FROM_70¬¨¬®‚ÄÖ√†√ªC_TO_65¬¨¬®‚ÄÖ√†√ªC_IN_T₃_MINUTES,_THEN?$#
A.	t<sub>1</sub>=t<sub>2</sub>=t<sub>3</sub>
B.	t<sub>1</sub> < t<sub>2</sub> = t<sub>3</sub>
C.	t<sub>1</sub> < t<sub>2</sub> < t<sub>3</sub>
D.	t<sub>1</sub> > t<sub>2</sub> > t<sub>3</sub>
Answer» D. t<sub>1</sub> > t<sub>2</sub> > t<sub>3</sub>

Discussion

14.	Gas thermometers are more sensitive than a mercury thermometer.$
A.	True
B.	False
Answer» B. False

Discussion

15.	A_black_body_is_at_727¬¨¬®‚Äö√†√ªC._It_emits_energy_at_a_rate,_which_is_proportional_to$#
A.	(727)<sup>2</sup>
B.	(1000)<sup>2</sup>
C.	(727)<sup>4</sup>
D.	(1000)<sup>4</sup>
Answer» E.

Discussion

16.	A spherical body of area A and emissivity e = 0.6 is kept inside a perfectly black body. Energy radiated per second by the body at temperature T is
A.	0.4‚âà√¨‚àö√¢AT<sup>4</sup>
B.	0.8 ‚âà√¨‚àö√¢AT<sup>4</sup>
C.	0.6 ‚âà√¨‚àö√¢AT<sup>4</sup>
D.	1.0 ‚âà√¨‚àö√¢AT<sup>4</sup>
Answer» D. 1.0 ‚âà√¨‚àö√¢AT<sup>4</sup>

Discussion

17.	If 1g of steam is mixed with 1g of ice, the resultant temperature of the mixture i?
A.	270¬¨¬®‚Äö√†√ª
B.	230¬¨¬®‚Äö√†√ª
C.	100¬¨¬®‚Äö√†√ª
D.	50¬¨¬®‚Äö√†√ª
Answer» D. 50¬¨¬®‚Äö√†√ª

Discussion

18.	A centigrade and Fahrenheit thermometers are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140¬¨¬®‚Äö√†√ª. What is the fall in temperature registered by the centigrade thermometer?$
A.	80¬¨¬®‚Äö√†√ªC
B.	60¬¨¬®‚Äö√†√ªC
C.	360¬¨¬®‚Äö√†√ªC
D.	30¬¨¬®‚Äö√†√ªC
Answer» D. 30¬¨¬®‚Äö√†√ªC

Discussion

19.	Assertion: Good conductors of heat are also good conductors of electricity and vice-versa
A.
B.	Both assertion and reason are true and the reason is the correct explanation of the assertion
C.	Both assertion and reason are true but the reason is not a correct explanation of the assertion
Answer» B. Both assertion and reason are true and the reason is the correct explanation of the assertion

Discussion

20.	On increasing the temperature of a substance gradually, its colour becomes
A.	Red
B.	Green
C.	Yellow
D.	White
Answer» D. White

Discussion

21.	A black body at a high temperature T K radiates energy at the rate of E Wm-2. When the temperature falls to T/2 K, the radiated energy will be
A.	E/4
B.	E/2
C.	2E
D.	E/16
Answer» E.

Discussion

22.	The bulb of one thermometer is spherical, while that of other is cylindrical. If both of them have an equal amount of mercury, which one will respond quickly to the temperature?
A.	Spherical
B.	Cylindrical
C.	Elliptical
D.	Circle
Answer» C. Elliptical

Discussion

23.	A constant pressure air thermometer gave a reading of 47.5 units of volume, when immersed in ice-cold water, and 67 units in a boiling liquid. The boiling point of the liquid is
A.	100¬¨¬®‚Äö√†√ªC
B.	112¬¨¬®‚Äö√†√ªC
C.	125¬¨¬®‚Äö√†√ªC
D.	135¬¨¬®‚Äö√†√ªC
Answer» C. 125¬¨¬®‚Äö√†√ªC

Discussion

24.	A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant, is known as
A.	Latent heat
B.	Sublimation
C.	Hoar frost
D.	Latent heat of fusion
Answer» E.

Discussion

Explore topic-wise MCQs in Engineering Physics.

A spherical body of area A and emissivity e = 0.6 is kept inside a perfectly black body. Energy radiated per second by the body at temperature T is ___________

Gas thermometers are more sensitive than a mercury thermometer.

A black body is at 727°C. It emits energy at a rate, which is proportional to ___________

A beaker full of hot water is kept in a room. If it cools from 80°C to 75°C in t1 minutes, from 75°C to 70°C in t2 minutes and from 70°C to 65°C in t3 minutes, then ___________

If 1g of steam is mixed with 1g of ice, what is the resultant temperature of the mixture?

A centigrade and Fahrenheit thermometers are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140°. What is the fall in temperature registered by the centigrade thermometer?

Assertion: Good conductors of heat are also good conductors of electricity and vice-versa.Reasons: Mainly electrons are responsible for these conductors.

On increasing the temperature of a substance gradually, its colour becomes ___________

A black body at a high temperature T K radiates energy at the rate of E Wm-2. When the temperature falls to T/2 K, the radiated energy will be ___________

The bulb of one thermometer is spherical, while that of other is cylindrical. If both of them have an equal amount of mercury, which one will respond quickly to the temperature?

A constant pressure air thermometer gave a reading of 47.5 units of volume, when immersed in ice-cold water, and 67 units in a boiling liquid. What is the boiling point of the liquid?

A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant, is known as ___________

Gas thermometers are more sensitive than a mercury thermometer.$

A_black_body_is_at_727¬¨¬®‚Äö√†√ªC._It_emits_energy_at_a_rate,_which_is_proportional_to$#

A spherical body of area A and emissivity e = 0.6 is kept inside a perfectly black body. Energy radiated per second by the body at temperature T is

If 1g of steam is mixed with 1g of ice, the resultant temperature of the mixture i?

A centigrade and Fahrenheit thermometers are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140¬¨¬®‚Äö√†√ª. What is the fall in temperature registered by the centigrade thermometer?$

Assertion: Good conductors of heat are also good conductors of electricity and vice-versa

On increasing the temperature of a substance gradually, its colour becomes

A black body at a high temperature T K radiates energy at the rate of E Wm-2. When the temperature falls to T/2 K, the radiated energy will be

The bulb of one thermometer is spherical, while that of other is cylindrical. If both of them have an equal amount of mercury, which one will respond quickly to the temperature?

A constant pressure air thermometer gave a reading of 47.5 units of volume, when immersed in ice-cold water, and 67 units in a boiling liquid. The boiling point of the liquid is

A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant, is known as