Dual Nature of Matter and Radiation-Black-Body Radiation (AIIMS Physics): Questions 1 - 4 of 5

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Question number: 1

» Dual Nature of Matter and Radiation » Black-Body Radiation

Appeared in Year: 2006

MCQ▾

Question

Three objects coloured black, gray and white can withstand hostile conditions up to 2800°C. These objects are thrown into a furnace where each of them attains a temperature of 2000°C. Which object will glow brightest?

Choices

Choice (4) Response

a.

Gray object

b.

The black object

c.

The white object

d.

Question does not provide sufficient data or is vague

Question number: 2

» Dual Nature of Matter and Radiation » Black-Body Radiation

Appeared in Year: 2003

MCQ▾

Question

Shown below are the black body radiation curves at temperatures T1 and T2 (T2>T1) . Which of the following plots is correct?

[AIIMS, AMU 2002]

Choices

Choice (4) Response

a.

Black body radiation curve: Choice A

Black Body Radiation Curve: Choice A

In figure, a black body radiation curve is shown

b.

Black body radiation curve: Choice B

Black Body Radiation Curve: Choice B

In figure, a black body radiation curve is shown

c.

Black body radiation curve: Choice C

Black Body Radiation Curve: Choice C

In figure, a black body radiation curve is shown

d.

Black body radiation curve: Choice D

Black Body Radiation Curve: Choice D

In figure, a black body radiation curve is shown

Question number: 3

» Dual Nature of Matter and Radiation » Black-Body Radiation

Appeared in Year: 2003

MCQ▾

Question

A black body, at a temperature of 227°C, radiates heat at a rate of 20calm2s1 . When its temperature is raised to 727°C, the heat radiated by it in calm2s1 will be closest to –

Choices

Choice (4) Response

a.

40

b.

640

c.

320

d.

160

Question number: 4

» Dual Nature of Matter and Radiation » Black-Body Radiation

Appeared in Year: 2005

Assertion-Reason▾

Assertion (Ꭺ)

For higher temperature the peak emission wavelength of a black body shifts to lower wavelength.

Reason (Ꭱ)

Peak emission wavelength of black body is proportional to the fourth power of temperature.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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