Internal Energy and Heat Transfer Test

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Internal Energy and Heat Transfer Test - 2

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Weekly Quiz Competition

Question 1
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 2
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 3
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 4
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 5
1 / -0

Transfer of heat in liquids and gases takes place by

A
conduction

B
convection

C
radiation

D
None of these
Question 6
1 / -0

Convection of mass cannot take place in

A
gases

B
liquids

C
solids

D
gases and liquids
Question 7
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 8
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 9
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 10
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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Internal Energy and Heat Transfer Test - 2

Result

Internal Energy and Heat Transfer Test - 2

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SHARING IS CARING

Question 1

1

4.2

4.2 × 103

4.2 × 106

Question 2

convection

conduction

radiation

none of these

Question 3

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 4

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 5

conduction

convection

radiation

None of these

Question 6

gases

liquids

solids

gases and liquids

Question 7

Radiation

Convection

Conduction

Insulation

Question 8

conduction

convection

radiation

none of these

Question 9

Only (ii)

Only (i) and (ii)

Only (ii) and (iii)

All (i), (ii) and (iii)

Question 10

Conduction

Convection

Radiation

Both convection and radiation

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4.2 × 10³

4.2 × 10⁶