Thermal Properties of Matter Test

Result

Thermal Properties of Matter Test - 67

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
4 / -1

There is a rough black spot on a polished metallic plate. It is heated upto 1400 K approximately and then at once taken in a dark room. Which of the following statements is true?

A
In comparison with the plate, the spot will shine more

B
In comparision with the plate, the spot will appear more black

C
The spot and the plate will be equally bright

D
The plate and the black spot can not be seen in the dark room
Question 2
4 / -1

At a certain temperature for given wavelength, the ratio of emissive power of a body to emissive power of black body in same circumstances is known as

A
Relative emissivity

B
Emissivity

C
Absorption coefficient

D
Coefficient of reflection
Question 3
4 / -1

Two thermometer A and B are exposed in sun light. The valve of A is painted black, but that of B is not painted. The correct statement regarding this case is

A
Temperature of A will rise faster than B but the final temperature will be the same in both

B
Both A and B show equal rise in beginning

C
Temperature of A will remain more than B

D
Temperature of B will rise faster
Question 4
4 / -1

There is a black spot on a body. If the body is heated and carried in dark room then it glows more. This can be explained on the basis of

A
Newton's law of cooling

B
Wien's law

C
Kirchhoff's law

D
Stefan's law
Question 5
4 / -1

A hot body will radiate heat most rapidly if its surface is

A
Whit and polished

B
White and rough

C
Black and polished

D
Black and rough
Question 6
4 / -1

An ideal black body at room temperature is thrown into a furnace. It s observed that

A
Initially it is the darkest body and at later times the brightest

B
It is the darkest body at all times

C
It cannot be distinguished at all times

D
Initially it is the darkest bosy and at later times it cannot be distinguished
Question 7
4 / -1

Absorption coefficient of an open window is

A
Zero

B
0.5

C
1

D
0.25
Question 8
4 / -1

According to Wien\'s alw

A

B

C

D
Question 9
4 / -1

On investigation of light fro three different stars A, B and C. It was found that in the spectrum of A the intensity of red colour is maximum, in B the intensity of blue colour is maximum and in C the intensity of yellow colour is maximum. From these observation it can be concluded that

A
The temperature of A is maximum, B is minimum and C is intermediate

B
The temperature of A is maximum, C is minimum and B is intermediate

C
The temperature of B is maximum, A is minimum and C is intermediate

D
The temperature of C is maximum, B is minimum and A is intermeidate

Solution
Question 10
4 / -1

If wavelength of maximum intensity of radiations emitted by the sun and the moon are 0.5 × 10^–1 m and 10^–4m respectively, the ratio of their temperature is

A
1/100

B
1/200

C
100

D
200

Solution