Heat Test

Result

Heat Test - 18

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

If we switch on a fan heater, it blow hot air through a grille into the room, then

A
Cold air rises upwards

B
Hot air rises upwards

C
Neither A nor B

D
None

Solution

Hot air is less dense and cold air is more dense. And we know that less dense gases rise above more dense air so hot air will rise upwards.
Question 2
1 / -0

A wooden rod is dipped in a cup of ice cream. The other end of the wooden rod

A
becomes cold by the process of conduction

B
becomes cold by the process of radiation

C
becomes cold by the process of convection

D
does not become cold

Solution

Wood is a bad conductor of heat. So it will not allow conduction of heat. Therefore, the other end of the rod will remain at the same temperature.
Question 3
1 / -0

Thermal radiation is also called

A
infrared radiation

B
EM radiation

C
nuclear radiation

D
None

Solution

Thermal radiation does not include any contact between hot body and cold body. It transfers heat without any medium. It falls within infrared zone of electromagnetic radiation, so it is also called $infrared \ radiation.$
Question 4
1 / -0

Find odd one out

A
Copper

B
Mercury

C
Gold

D
Wood

Solution

Copper, mercury and gold are good conductors of heat while wood is a bad conductor.
Question 5
1 / -0

What type of conductor should be used to make water pipes in cold countries?

A
Good conductor

B
Poor conductor or bad conductor

C
Material does not help in such cases

D
None of the above

Solution

The materials which do not allow heat to pass through them are known as bad conductors or insulators. Poor conductors should be used to make water pipes in cold countries so that they will not allow heat to pass from water inside the pipe to the outside atmosphere to prevent water from freezing. It thus helps the pipes from bursting.
Question 6
1 / -0

The temperature of a normal human being is

A
$31^{o} C$

B
$37^{o} C$

C
$20^{o} C$

D
$50^{o} C$

Solution

$98.4^{o} F$ is the usual body temperature of a normal human being. It is also equal to $37^{o} C$ .
Question 7
1 / -0

If two bodies A and B of $50^{0} C$ comes in contact with each other, the heat will flow

A
Body A $\rightarrow$ Body B

B
Body B $\rightarrow$ Body A

C
nowhere

D
from both the bodies

Solution

Heat always flows from a hot object to a cold object as shown. Heat transfer needs a temperature difference to take place. Now here, both the bodies are at the same temperature, so there will be no transfer of heat from one body to the other
Question 8
1 / -0

S.I unit of temperature is

A
$^{\circ} C$

B
$K$

C
$J$

D
All

Solution
Question 9
1 / -0

Define insulator of heat.

A
Substances through which heat can pass easily are called insulators of heat.

B
Substances through which heat cannot pass easily are called insulators of heat.

C
Substance which can easily freeze are called insulators of heat.

D
Substances which cannot freeze easily are called insulators of heat.

Solution

Materials which allow heat to pass through them are called conductors of heat and the material which does not allow heat to pass through them are called insulators of heat.
Question 10
1 / -0

Specific heat capacity is ______ for conductors of heat and _______ for insulators of heat.

A
low, low

B
low, high

C
high, high

D
high, low

Solution

$Q=ms\Delta T$ ,
where
$Q: \text{the amount of heat delivered to a body}$
$m: \text{mass of the body}$
$s: \text{specific heat capacity of the body}$
$\Delta T: \text{Change in temperature of the body}$

If $Q\ \text{and}\ m$ are constant,
$\Delta T \propto \dfrac{1}{s}$

So for small $s, \Delta T$ is more and hence it is better conductor of heat.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Heat Test - 18

Result

Heat Test - 18

Score

-

Rank

-

SHARING IS CARING

Question 1

Cold air rises upwards

Hot air rises upwards

Neither A nor B

None

Solution

Question 2

becomes cold by the process of conduction

becomes cold by the process of radiation

becomes cold by the process of convection

does not become cold

Solution

Question 3

infrared radiation

EM radiation

nuclear radiation

None

Solution

Question 4

Copper

Mercury

Gold

Wood

Solution

Question 5

Good conductor

Poor conductor or bad conductor

Material does not help in such cases

None of the above

Solution

Question 6

31oC31^{o} C31oC

37oC37^{o} C37oC

20oC20^{o} C20oC

50oC50^{o} C50oC

Solution

Question 7

Body A →\rightarrow→ Body B

Body B →\rightarrow→ Body A

nowhere

from both the bodies

Solution

Question 8

∘C^{\circ} C∘C

KKK

JJJ

All

Solution

Question 9

Substances through which heat can pass easily are called insulators of heat.

Substances through which heat cannot pass easily are called insulators of heat.

Substance which can easily freeze are called insulators of heat.

Substances which cannot freeze easily are called insulators of heat.

Solution

Question 10

low, low

low, high

high, high

high, low

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.

$31^{o} C$

$37^{o} C$

$20^{o} C$

$50^{o} C$

Body A $\rightarrow$ Body B

Body B $\rightarrow$ Body A

$^{\circ} C$

$K$

$J$