Thermal Properties of Matter Test

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Thermal Properties of Matter Test - 66

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Weekly Quiz Competition

Question 1
4 / -1

Pick out the statement which is not true?

A
IR radiations are used for long distance photography

B
IR radiations arise due to inner electron transitions in atome

C
IR radiations are detected by using a bolometer

D
Sun is the natural source of IR radiation
Question 2
4 / -1

Good absorbers of heat are

A
Poor emitters

B
Non-emitters

C
Good emitters

D
Highly polished
Question 3
4 / -1

Certain substances emits only the wavelength λ₁, λ₂, λ₃ and λ₄ when it is at a high temperature. When this substance is at a colder temperature, it will absorb only the following wavelengths

A
λ₁

B
λ₂

C
λ₁ and λ₂

D
λ₁, λ₂, λ₃ and λ₄
Question 4
4 / -1

As compared to the person with white skin, the person with black skin will experience

A
Less heat and more cold

B
More heat and more cold

C
More heat and less cold

D
Less heat and less cold
Question 5
4 / -1

A red flower kept in green light will appear

A
Red

B
Yellow

C
Black

D
White
Question 6
4 / -1

Which of the following statements is wrong?

A
Rough surfaces are better radiators than smooth surface

B
Highly polished mirror like surfaces are very good radiators

C
Black surfaces are better absorbers than white ones

D
Black surfaces are better radiators than white
Question 7
4 / -1

A perfect black body is one whose emissive power is

A
Maximum

B
Zero

C
Unity

D
Minimum
Question 8
4 / -1

If between wavelength λ and λ + dλ, e_λ and a_λ be the emissive and absorptive powers of a body and E_λ be the emissive power of a perfectly black body, then according to Kirchoff\'s law which is true

A
e_λ = a_λ = E_λ

B
e_λE_λ = a_λ

C
e_λ = a_λE_λ

D
e_λa_λE_λ = constant

Solution
Question 9
4 / -1

Distribution of energy in the spectrum of a black body can be correctly represented by

A
Wein's law

B
Stefan's law

C
Planck's law

D
Kirchhoff's law
Question 10
4 / -1

A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a dimly lit room then

A
The blue piece will look blue and red will look as usual

B
Red look brighter red and blue look oridinary blue

C
Blue shines like brighter red compared to the red piece

D
Both he pieces will look equally red

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Re-Attempt Weekly Quiz Competition

Thermal Properties of Matter Test - 66

Result

Thermal Properties of Matter Test - 66

Score

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Rank

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SHARING IS CARING

Question 1

IR radiations are used for long distance photography

IR radiations arise due to inner electron transitions in atome

IR radiations are detected by using a bolometer

Sun is the natural source of IR radiation

Question 2

Poor emitters

Non-emitters

Good emitters

Highly polished

Question 3

λ1

λ2

λ1 and λ2

λ1, λ2, λ3 and λ4

Question 4

Less heat and more cold

More heat and more cold

More heat and less cold

Less heat and less cold

Question 5

Red

Yellow

Black

White

Question 6

Rough surfaces are better radiators than smooth surface

Highly polished mirror like surfaces are very good radiators

Black surfaces are better absorbers than white ones

Black surfaces are better radiators than white

Question 7

Maximum

Zero

Unity

Minimum

Question 8

eλ = aλ = Eλ

eλEλ = aλ

eλ = aλEλ

eλaλEλ = constant

Solution

Question 9

Wein's law

Stefan's law

Planck's law

Kirchhoff's law

Question 10

The blue piece will look blue and red will look as usual

Red look brighter red and blue look oridinary blue

Blue shines like brighter red compared to the red piece

Both he pieces will look equally red

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My Perfomance

Score

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λ₁

λ₂

λ₁ and λ₂

λ₁, λ₂, λ₃ and λ₄

e_λ = a_λ = E_λ

e_λE_λ = a_λ

e_λ = a_λE_λ

e_λa_λE_λ = constant