In photoelectric effect, the kinetic energy of photoelectrons increases linearly with the:

1. Wavelength of incident light.

2. Frequency of incident light.

3. Velocity of incident light.

4. Atomic mass of an element.

Subtopic:  Photo Electric Effect |
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Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of
wavelength 6800 Å. The
work function (W0 ) of the metal is:

1. 3.109 x 10-20 J

2. 2.922 x 10-19 J

3. 4.031 x 1019 J

4. 2.319 x 10-18 J

Subtopic:  Photo Electric Effect |
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The photoelectric emission from a surface starts only when the light incident upon the surface has a certain minimum:

 1 Intensity 2 Wavelength 3 Frequency 4 Velocity
Subtopic:  Photo Electric Effect |
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A photon of wavelength 4 × 10–7 m strikes a metal surface, the work function of the metal being 2.13 eV.  The kinetic energy of emission would be:

 1 0.97 eV 2 97 eV 3 4.97 × ${10}^{-19}$ eV 4 5.84 × 105 eV

Subtopic:  Photo Electric Effect |
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The work function for the Cesium atom is $$1.9~\mathrm{eV}.$$ The threshold frequency of the radiation is:

 1 $$4.59 \times10^{14}~s^{-1}$$ 2 $$8.59 \times10^{14}~s^{-1}$$ 3 $$5.59 \times10^{-14}~s^{-1}$$ 4 $$65.9 \times10^{14}~s^{-1}$$
Subtopic:  Photo Electric Effect |
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When a photon with a wavelength of 150 pm strikes an atom, one of its inner bound electrons is ejected at a velocity of 1.5 × 107 m s–1 The energy with which it is bound to the nucleus would be:

1. 32.22 × 10–16 J

2. 12.22 × 10–16 J

3. 22.27 × 10–16 J

4. 31.22 × 10–16 J

Subtopic:  Photo Electric Effect |
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A photon with an initial frequency of $$10^{11}~\mathrm{Hz}$$ scatters off an electron at rest. Its final frequency is $$0.9 \times10^{11}~\mathrm{Hz}.$$ The speed of scattered electron is close to:

 1 $$3 \times10^{2}~\mathrm{ms}^{-1}$$ 2 $$3.8 \times10^{3}~\mathrm{ms}^{-1}$$ 3 $$2 \times10^{6}~\mathrm{ms}^{-1}$$ 4 $$30~\mathrm{ms}^{-1}$$



Subtopic:  Photo Electric Effect |
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The ejection of the photoelectron from the silver metal can be stopped by applying a voltage of 0.35 eV when the radiation having a wavelength of 256.7 nm is used. The work function for silver metal is:

1. 3.40 eV

2. 5.18 eV

3. 4.48 eV

4. -4.40 eV

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The ratio of slopes of  curves in photoelectric effect gives -

(v=frequency, ${\mathrm{K}}_{\mathrm{max}}$=maximum kinetic energy, ${\mathrm{V}}_{0}$ stopping potential):

1.  Charge of electron

2.  Planck's constant

3.  Work function

4.  The ratio of Planck's constant of electronic charge

Subtopic:  Photo Electric Effect |
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