Heat Test

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Heat Test - 26

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Weekly Quiz Competition

Question 1
1 / -0

The temperature at which a body does not radiate energy

A
$0^{0}$ C

B
$0\ K$

C
$273\ K$

D
$4^{0}$ C

Solution

Energy radiated becomes $0$ only when absolute temperature becomes $0$ .
Question 2
1 / -0

Solids get heated by

A
Conduction

B
Convection

C
Radiation

D
None

Solution

Solids are heated mainly by conduction.
Conduction is a process where heat is transferred from one particle to other particles through collisions. This transfer of heat occurs only in solids as in solids all particles are packed tightly.
Question 3
1 / -0

The thermodynamic scale of temperature was given by

A
Dewar

B
Fahrenheit

C
Kelvin

D
Carnot

Solution

Lord Kelvin devised the thermodynamic scale based on the efficiency of heat engines.
Question 4
1 / -0

Which metal is a good conductor of heat?

A
Gold

B
Carbon

C
Lead

D
Alloys

Solution

A metal having free electrons is generally good conductor of heat. because in it heat transfer takes place by vibration of molecules as well as movement of electrons. But in others like non-metal heat transfer takes place only by vibration of molecules.
In above given option Carbon and lead are non-metal and alloys have relatively less free-electrons than Gold. So Gold is a good conductor of heat.
Question 5
1 / -0

Name the temperature scale used in S.I. system.

A
Kelvin scale

B
Celsius scale

C
Fahrenheit scale

D
All of the above

Solution

Kelvin scale is used in S.I. system
Question 6
1 / -0

Choose the correct experiment to demonstrate the transfer of heat by the process of conduction.

A
Take two metal blocks of same size & shape and heat one of them to a considerable temperature, then allow both the blocks to touch each other, after a while, you will see the other block gets heated due to contact.

B
Take two metal blocks of same size & shape and heat one of them to a considerable temperature, then keep the blocks separate, after a while you will see the other block gets heated due to contact.

C
Take two metal blocks of same size & shape and heat one of them to a considerable temperature, then allow both the blocks to touch each other after the block get cooled down, after a while you will see the other block gets heated due to contact.

D
None of above

Solution

Conduction is a process by which heat is transmitted through microscopic collisions of particles. This process occurs in solids where the particles are more close together.

To demonstrate this, take two metal blocks of same size & shape and heat one of them to a considerable temperature, then allow both the blocks to touch each other, after a while you will see the other block gets heated due to contact.
Question 7
1 / -0

The measure of degree of hotness or coldness of a body is called:

A
Heat energy

B
Celsius

C
Kelvin

D
Temperature

Solution

The measure of degree of hotness or coldness of a body is called temperature.
Question 8
1 / -0

Complete the following sentences:
(a) Metals are ............. conductors of heat, while gases are ............ conductors of heat.
(b) Water is a ............ conductor of heat, while silver is a ................ conductor of heat.
(c) Silver is ............... conductor of heat than iron.

A
(a) good, bad

(b) very poor, good

(c) a better

B
(a) good, bad

(b) very good, good

(c) a better

C
(a) bad, good

(b) very poor, good

(c) a better

D
(a) good, bad

(b) very poor, bad

(c) a better

Solution

(a) Metals are good conductors of heat, while gases are poor conductors of heat.
The metal has a loose-packed metal lattice which gives the metal ease to transfer the heat from one atom to the other. Also, the free-electron availability of the metal atom makes it efficient to transfer heat and makes it a good conductor of heat.
Non-metals are not less dense and so they don't have enough free electrons to pass heat efficiently. In nonmetals, electrons are held tightly, And no free electrons are allowed to move freely.
(b) Very poor, good.
(c) Better
Question 9
1 / -0

The range of a clinical thermometer is

A
0-100 $^0$ C

B
32-214 $^0$ F

C
0-1273 $^0$ C

D
35-42 $^0$ C

Solution

A clinical thermometer is used to measure the body temperature which normally remains between $35^{\circ}$ C and $42^{\circ}$ C.
Question 10
1 / -0

When two bodies at different temperatures are placed in thermal contact with each other, heat flows from the body at a higher temperature until they both acquire the same temperature. Assuming that there is no loss of heat to the surroundings, then:

A
The heat gained by the hotter body will be equal to the heat lost by the colder body

B
The heat gained by the hotter body will be less than the heat lost by the colder body

C
The heat gained by the hotter body will be greater than the heat lost by the colder body

D
The heat lost by the hotter body will be equal to the heat gained by the colder body.

Solution

Heat is a form of energy that gets transferred from one medium or object to another medium/object. Suppose if we a colder body and a hotter body and if it brought in contact, the heat gets transferred from the hotter body to colder body until the system of hotter & colder attains equilibrium.
When two bodies at different temperatures are placed in thermal contact with each other, heat flows from the body at a higher temperature until they both acquire the same temperature. Assuming that there is no loss of heat to the surroundings, then The heat lost by the hotter body will be equal to the heat gained by the colder body.
option D is correct

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Heat Test - 26

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Heat Test - 26

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Question 1

000^{0}00C

0 K0\ K0 K

273 K273\ K273 K

404^{0}40 C

Solution

Question 2

Conduction

Convection

Radiation

None

Solution

Question 3

Dewar

Fahrenheit

Kelvin

Carnot

Solution

Question 4

Gold

Carbon

Lead

Alloys

Solution

Question 5

Kelvin scale

Celsius scale

Fahrenheit scale

All of the above

Solution

Question 6

Take two metal blocks of same size & shape and heat one of them to a considerable temperature, then allow both the blocks to touch each other, after a while, you will see the other block gets heated due to contact.

Take two metal blocks of same size & shape and heat one of them to a considerable temperature, then keep the blocks separate, after a while you will see the other block gets heated due to contact.

Take two metal blocks of same size & shape and heat one of them to a considerable temperature, then allow both the blocks to touch each other after the block get cooled down, after a while you will see the other block gets heated due to contact.

None of above

Solution

Question 7

Heat energy

Celsius

Kelvin

Temperature

Solution

Question 8

(a) good, bad(b) very poor, good(c) a better

(a) good, bad(b) very good, good(c) a better

(a) bad, good(b) very poor, good(c) a better

(a) good, bad(b) very poor, bad(c) a better

Solution

Question 9

0-1000^00C

32-2140^00F

0-12730^00C

35-420^00C

Solution

Question 10

The heat gained by the hotter body will be equal to the heat lost by the colder body

The heat gained by the hotter body will be less than the heat lost by the colder body

The heat gained by the hotter body will be greater than the heat lost by the colder body

The heat lost by the hotter body will be equal to the heat gained by the colder body.

Solution

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$0^{0}$ C

$0\ K$

$273\ K$

$4^{0}$ C

(a) good, bad

(b) very poor, good

(c) a better

(a) good, bad

(b) very good, good

(c) a better

(a) bad, good

(b) very poor, good

(c) a better

(a) good, bad

(b) very poor, bad

(c) a better

0-100 $^0$ C

32-214 $^0$ F

0-1273 $^0$ C

35-42 $^0$ C