Internal Energy and Heat Transfer Test

Result

Internal Energy and Heat Transfer Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

The direction of the flow of heat depends upon

A
quantity of heat in a body

B
temperature difference

C
both (1) and (2)

D
none of these
Question 2
1 / -0

What is the value of zero kelvin on celsius scale?

A
- 273^oC

B
- 32^oC

C
- 0^oC

D
100^oC
Question 3
1 / -0

The normal temperature of a human body on ^oF scale is

A
36.8^o

B
63.8^o

C
98.4^o

D
95.3^o
Question 4
1 / -0

Two bodies A and B are at the same temperature (50^oC). They are placed in contact. The final result will be

A
temperature of A becomes 100^oC

B
temperature of B becomes 100^oC

C
temperature of both A and B becomes 100^oC

D
no change in temperature
Question 5
1 / -0

Why is alcohol more volatile as compared to water?

A
The boiling point of alcohol is more than that of water.

B
The boiling point of alcohol is less than that of water.

C
The melting point of alcohol is less than that of water.

D
The melting point of alcohol is more than that of water.
Question 6
1 / -0

Which of the following statements is NOT true?

A
A calorimeter is used to measure heat energy.

B
Heat energy lost by a hot body is equal to the heat energy gained by a cold body.

C
The SI unit of heat is calories.

D
Heat energy is the sum of potential and kinetic energies of the molecules of the substance.

Solution

Although 'calorie' is the more commonly used unit to measure heat energy, the SI unit for all forms of energy is 'Joule'.
Question 7
1 / -0

Which of the following thermometers can be used to measure temperature of boiling water?

A
Clinical thermometer

B
Laboratory thermometer

C
Maximum-minimum thermometer

D
Both (1) and (2)
Question 8
1 / -0

What is the upper range of temperature of a laboratory thermometer?

A
100°C

B
108°C

C
110°C

D
140°C
Question 9
1 / -0

How are the units` calorie and joule related to each other?

A
1 J = 4.2 cal

B
1 cal = 4.2 J

C
1 cal = 4.2 10³ J

D
1 J = 4.2 10³ cal
Question 10
1 / -0

How many joules of energy are equal to 5 calories?

A
20.9 joules

B
1.20 joules

C
0.84 joules

D
5.00 joules
Question 11
1 / -0

Taking the unit of work as joule and the unit of amount of heat as kcal, the magnitude of Joule`s mechanical equivalent of heat is

A
1

B
4.2

C
4.2 10³

D
4.2 10⁶
Question 12
1 / -0

The process in which heat flows from one end of the body to the other in the direction of fall of temperature without actual movement of the particles is called

A
convection

B
conduction

C
radiation

D
none of these
Question 13
1 / -0

Which of the following statements is NOT true?

A
A good conductor loses heat faster.

B
A material of high conductivity can absorb large amount of heat.

C
The coefficient of thermal conductivity cannot determine the direction of propagation of heat.

D
Free electrons transport heat from higher temperature to lower temperature.
Question 14
1 / -0

Which of the following statements is true?

A
The thermal conductivity of gases is zero.

B
Fur coats keep us warm by absorbing heat from outside.

C
If we double the length of the rod, its thermal conductivity is halved.

D
Solids cannot transmit heat by convection.
Question 15
1 / -0

Transfer of heat in liquids and gases takes place by

A
conduction

B
convection

C
radiation

D
None of these
Question 16
1 / -0

Convection of mass cannot take place in

A
gases

B
liquids

C
solids

D
gases and liquids
Question 17
1 / -0

By which of the following processes does a space heater warm an entire room?

A
Radiation

B
Convection

C
Conduction

D
Insulation
Question 18
1 / -0

Transfer of heat from a hot to a cold body without heating the intervening medium is called

A
conduction

B
convection

C
radiation

D
none of these
Question 19
1 / -0

Which of the following is a result of transfer of heat by radiation?
(i) If we sit near a fire, we feel warm.
(ii) It is cool in the shade when it is hot outside.
(iii) In a toaster, slices of bread get heat from the heating coil.

A
Only (ii)

B
Only (i) and (ii)

C
Only (ii) and (iii)

D
All (i), (ii) and (iii)
Question 20
1 / -0

Which of the following modes of transfer of heat does/do not require any medium?

A
Conduction

B
Convection

C
Radiation

D
Both convection and radiation

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Re-Attempt Weekly Quiz Competition

Internal Energy and Heat Transfer Test - 3

Result

Internal Energy and Heat Transfer Test - 3

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SHARING IS CARING

Question 1

quantity of heat in a body

temperature difference

both (1) and (2)

none of these

Question 2

- 273oC

- 32oC

- 0oC

100oC

Question 3

36.8o

63.8o

98.4o

95.3o

Question 4

temperature of A becomes 100oC

temperature of B becomes 100oC

temperature of both A and B becomes 100oC

no change in temperature

Question 5

The boiling point of alcohol is more than that of water.

The boiling point of alcohol is less than that of water.

The melting point of alcohol is less than that of water.

The melting point of alcohol is more than that of water.

Question 6

A calorimeter is used to measure heat energy.

Heat energy lost by a hot body is equal to the heat energy gained by a cold body.

The SI unit of heat is calories.

Heat energy is the sum of potential and kinetic energies of the molecules of the substance.

Solution

Question 7

Clinical thermometer

Laboratory thermometer

Maximum-minimum thermometer

Both (1) and (2)

Question 8

100°C

108°C

110°C

140°C

Question 9

1 J = 4.2 cal

1 cal = 4.2 J

1 cal = 4.2 103 J

1 J = 4.2 103 cal

Question 10

20.9 joules

1.20 joules

0.84 joules

5.00 joules

Question 11

1

4.2

4.2 103

4.2 106

Question 12

convection

conduction

radiation

none of these

Question 13

A good conductor loses heat faster.

A material of high conductivity can absorb large amount of heat.

The coefficient of thermal conductivity cannot determine the direction of propagation of heat.

Free electrons transport heat from higher temperature to lower temperature.

Question 14

The thermal conductivity of gases is zero.

Fur coats keep us warm by absorbing heat from outside.

If we double the length of the rod, its thermal conductivity is halved.

Solids cannot transmit heat by convection.

Question 15

- 273^oC

- 32^oC

- 0^oC

100^oC

36.8^o

63.8^o

98.4^o

95.3^o

temperature of A becomes 100^oC

temperature of B becomes 100^oC

temperature of both A and B becomes 100^oC

1 cal = 4.2 10³ J

1 J = 4.2 10³ cal

4.2 10³

4.2 10⁶