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Saturation Current

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Find the maximum velocity of photoelectrons emitted by radiation of frequency 3 × 1015 H from a photoelectric surface having work function of 4.0 eV. \lbrack h = 6.6 × 10–34 J-s and me = 9.1 × 10–31 kg\rbrack

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Q. An electromagnetic radiation of frequency

3 \times 10^{15}

Hz falls on a photosurface whose work function is 4 eV. Then the maximum velocity of the photo electrons emitted from the surface is

h = 6.6 \times 10^{- 34} J s

m = 9 \times 10^{- 31}

Q. The work function of a metal is

2 e V

. If a radiation of wavelength

3000

˚ A

is incident on it, the maximum kinetic energy of the emitted photoelectrons is :
(Planck's constant

h = 6.6 \times 10^{- 34} J s

; Velocity of light

c = 3 \times 10^{8} m / s; 1 e V = 1.6 \times 10^{- 19} J

Q. Ultraviolet light of wavelength

99 nm

falls on a metal plate of work function

1.0 eV .

Find the wavelength of the fastest photoelectron emitted.

(m_{electron} = 9.1 \times 10^{- 31} kg and h = 6.6 \times 10^{- 34} Js)

Q. When electromagnetic radiation of wavelength

500 \circ A

is incident on a metal sheet that has a work function of 15.6 eV, find the maximum kinetic energy of the photoelectrons emitted.
Take

h = 6.6 \times 10^{- 34} J s

Q. When electromagnetic radiation of wavelength

396 \circ A

is incident on a metal sheet that has a work function of 15.6 eV, find the maximum kinetic energy of the photoelectrons emitted.
Take

h = 6.6 \times 10^{- 34} J s

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