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

Subtopic:  Photo Electric Effect |
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The ratio of slopes of Kmax vs. v and V0 vs. v curves in photoelectric effect gives -

(v=frequency, Kmax=maximum kinetic energy, V0 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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