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Choose the correct statements regarding the phenomena of photoelectric effect

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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 3

The figure shows the results of an experiment involving photoelectric effect. The graphs $A, B, C$ and $D$ relate to a light beam having different wavelengths. Select the correct alternative

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 4

Choose the correct alternative.

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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 = 400 nm

then stopping potential for photoelectrons comes out

3 V_{0}

. When the same metallic surface is illuminated with a light of wavelength

800 nm

then stopping potential becomes

V_{0}

. If

λ_{th}

is threshold wavelength for the metallic surface and

W

is the work function of the metal, then

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment>Q 6

A metal surface is irradiated by light of wavelength,

λ = 200 nm

. The most energetic emitted photoelectrons are bent in a circle of radius

2 m

by a magnetic field of

3.02 \times 10^{- 6}

T perpendicular to the velocity. Then

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

A point source of light emitting power

W

is placed inside at the center of a soap bubble of radius

R .

Surface of soap bubble is perfectly absorbing and

P_{0}

is the atmospheric pressure. If

P_{R}

is the radiation pressure on the surface of soap bubble due to point source and

P_{i}

is the net pressure inside the soap bubble having surface tension

T

, then choose the correct answer

c

is the speed of light)

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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 of intensity $I$ is incident on a plane mirror and get reflected fully as shown in figure. The pressure exerted by beam on the mirror is ( $c$ : speed of light)

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

A photosensitive metal plate is exposed to a monochromatic light beam of frequency which is more than threshold frequency. Then plot of

\frac{d N}{d K}

versus

K

, is best represented by

[N =

No. of photoelectrons,

K =

kinetic energy of photoelectron]

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

When light of wavelength

λ

is incident on a metal surface, the stopping potential is found to be

V_{0}

. When light of wavelength

\frac{λ}{n}

is incident on the same metal surface, the stopping potential is found to be

n^{2} V_{0}

. The cut off wavelength for the metal is given by

Choose the correct statements regarding the phenomena of photoelectric effect

Important Questions on Dual Nature of Radiation and Matter

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