Dual Nature of Matter and Radiation-Photoelectric Effect (AIIMS (All India Institute of Medical Sciences) Physics): Questions 1 - 4 of 8

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Question number: 1

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2004

MCQ▾

Question

A photon of energy 4 eV is incident on a metal surface whose work function is 2eV. The minimum reverse potential to be applied for stopping the emission of electrons is – [AIIMS]

Choices

Choice (4) Response

a.

6V

b.

4V

c.

8V

d.

2V

Question number: 2

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2006

MCQ▾

Question

In photoelectric effect, the electrons are ejected from metals if the incident light has a certain minimum – [AIIMS]

Choices

Choice (4) Response

a.

Angle of incidence

b.

Wavelength

c.

Amplitude

d.

Frequency

Question number: 3

» 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: 4

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2004

Assertion-Reason▾

Assertion (Ꭺ)

Photoelectric effect demonstrates the wave nature of light.

Reason (Ꭱ)

The number of photo electrons is proportional to the frequency of light.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are false

d.

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

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