Heat Test

Result

Heat Test - 14

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

In conduction, heat flows from:

A
Hotter to hotter region

B
Colder to hotter region

C
Hotter to colder region

D
Colder to colder region

Solution

Heat energy always flows due to temperature differences. And the direction of flow is Hotter to colder region.
Question 2
1 / -0

Conduction of heat is possible:

A
when the bodies are apart from each other

B
when the bodies have same temperature and in thermal contact

C
when they have different temperatures maintaining distance between them

D
when bodies should be in contact and should have different temperatures

Solution

Conduction is only possible when the bodies in contact have a temperature difference; heat flows from the body with higher temperature to that of lower temperature, till the bodies are in thermal equilibrium.
Question 3
1 / -0

The best conductor of heat is

A
Silver

B
Bronze

C
Aluminium

D
Copper

Solution

Silver is the best conductor of heat among the given options.
Question 4
1 / -0

It is warmer to have two thin blankets than to have single thick blanket because:

A
Thick blankets cannot give more warmth

B
Two blankets allow more heat to pass through them

C
Air between the two blankets is a good conductor of heat

D
Air between the thin blankets does not allow heat to pass through it since it is a bad conductor

Solution

Air trapped between two thin blankets does not allow heat to pass through it, as air is a bad conductor of heat. Hence, it is warmer to have two thin blankets than to have a single thick blanket.
Question 5
1 / -0

The hotness of an object is determined by its ...............

A
Temperature

B
Specific Heat Capacity

C
Radiation

D
Conduction

Solution

1. The hotness of an object is determined by its temperature.
2. Specific heat capacity is defined as the amount of heat required to raise the temperature of 1 kilogram of a substance by 1 kelvin
3. Radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
4. Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules.
Question 6
1 / -0

Cups are not made of metals. The reason is:

A
Metals are good conductors

B
Metals are bad conductors

C
Metals are expensive

D
None of the above

Solution

Metals are good conductors of heat hence a person might get his fingers injured if he holds a hot metal cup filled with tea or any other hot liquid.
Question 7
1 / -0

In Solar cooker:

A
Electricity is used to cook food

B
Chemical energy is converted to electrical energy

C
Radiation from the sun is used to cook food

D
Heat energy is converted light energy

Solution

Solar cooker has reflectors which reflect the sun's radiation into the food kept inside. This reflected radiation provides enough heat for cooking.
Question 8
1 / -0

Thermoflasks and doors of refrigerators have two-layered structure with an insulator in between so as:

A
To allow more heat to pass through it

B
Not to let heat flow through it

C
To make it stronger

D
To beautify it

Solution

An insulator between the two layers prevents heat exchange.
Some materials do not allow the heat to flow through them, and they are known as bad heat conductors or heat insulators, the insulators are poor heat conductors, the poor conductors are good insulators and they are materials that the heat cannot move through them.
Question 9
1 / -0

Temperature of boiling water cannot be measured by a ________ thermometer.

A
Clinical thermometer

B
Laboratory thermometer

C
Both $$A and B

D
None of these

Solution

The temperature of boiling water cannot be measured by a Clinical thermometer because the range of clinical thermometer varies between only $$35^\circ C$$ to $$42^\circ C.$$
Question 10
1 / -0

The heat energy emitted by sun reaches the earth through:

A
Conduction

B
Convection

C
Radiation

D
None

Solution

Since there is no medium in space. So, the heat from the sun propagate without a medium to reach the earth's surface which is a property of radiation.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Heat Test - 14

Result

Heat Test - 14

Score

-

Rank

-

SHARING IS CARING

Question 1

Hotter to hotter region

Colder to hotter region

Hotter to colder region

Colder to colder region

Solution

Question 2

when the bodies are apart from each other

when the bodies have same temperature and in thermal contact

when they have different temperatures maintaining distance between them

when bodies should be in contact and should have different temperatures

Solution

Question 3

Silver

Bronze

Aluminium

Copper

Solution

Question 4

Thick blankets cannot give more warmth

Two blankets allow more heat to pass through them

Air between the two blankets is a good conductor of heat

Air between the thin blankets does not allow heat to pass through it since it is a bad conductor

Solution

Question 5

Temperature

Specific Heat Capacity

Radiation

Conduction

Solution

Question 6

Metals are good conductors

Metals are bad conductors

Metals are expensive

None of the above

Solution

Question 7

Electricity is used to cook food

Chemical energy is converted to electrical energy

Radiation from the sun is used to cook food

Heat energy is converted light energy

Solution

Question 8

To allow more heat to pass through it

Not to let heat flow through it

To make it stronger

To beautify it

Solution

Question 9

Clinical thermometer

Laboratory thermometer

Both $$A and B

None of these

Solution

Question 10

Conduction

Convection

Radiation

None

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.