Dual Nature of Matter and Radiation (AIIMS Physics): Questions 5 - 8 of 27

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Question number: 5

» Dual Nature of Matter and Radiation » De-Broglie Relation

Appeared in Year: 2003

MCQ▾

Question

If an electron and a photon propagate in the form of waves having the same wavelength, it implies that can they have the same –

Choices

Choice (4) Response

a.

Momentum

b.

Angular momentum

c.

Velocity

d.

Energy

Question number: 6

» 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: 7

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2006

Assertion-Reason▾

Assertion (Ꭺ)

The photoelectrons produced by a monochromatic light beam incident on a metal surface have a spread in their kinetic energies.

Reason (Ꭱ)

The work function of the metal varies as a function of depth from the surface.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

Ꭺ is false but Ꭱ is true

Question number: 8

» 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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