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For a photoelectric cell, the graph in figure showing the variation of the cut-off voltage $V_{0}$ with frequency (v) of incident light is

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Important Questions on Dual Nature of Radiation and Matter

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 5

When a metallic surface is illuminated with monochromatic light of wavelength

λ

, the stopping potential is

5 V_{0}

. When the same surface is illuminated with light of wavelength

3 λ

, the stopping potential is

V_{0}

. Then the work function of the metallic surface is (Here

h

= Planck's constant and

c

= Speed of light)

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 7

Two photons of energies twice and thrice the work function of a metal surface. Then the ratio of maximum velocities of the photoelectrons emitted in the two cases respectively is

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 8

A beam of light consists of three distinct wavelengths

λ, 2 λ

and

3 λ

. The number of photons passing through unit area per unit time for three wavelengths are

n, 2 n

and

3 n

respectively. Then the intensity of the beam is

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 9

Figure shows the graph which depicts the stopping potential $(V_{0})$ versus frequency $(V)$ of incident radiations for two metals $M_{1}$ and $M_{2}$ . Select the correct alternative.

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 10

A point source of constant power

P

is emitting photons of frequency

v

. What is the photon flux at a distance

r

from the source?

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 14

The radiation force experienced by a disc of radius

r

when exposed to radiation of intensity

/

F

, then the maximum value of

F

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 1

The stopping potential for photo electron emitted from a metal surface of work function

1.7 eV

10.4 V .

Select correct choice

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 2

Choose the correct statements regarding the phenomena of photoelectric effect

For a photoelectric cell, the graph in figure showing the variation of the cut-off voltage V0 with frequency (v) of incident light is

Important Questions on Dual Nature of Radiation and Matter

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For a photoelectric cell, the graph in figure showing the variation of the cut-off voltage $V_{0}$ with frequency (v) of incident light is