PHOTOELECTRIC EFFECT - NUMERICALS AND SOLUTIONS - EXPLANATION - NOTES(PDF)
1.The energy required to remove electron from sodium is 2.3 eV. Does
sodium show photoelectric effect for orange light of wavelength 6800 Å ?
2.Find the maximum kinetic energy of electrons ejected from a certain
material if material's work function is 2.3 eV and the frequency of the
incident radiation is 3.0 x 10^15 Hz?
3.The work function for potassium and caesium is 2.25 eV and 2.14 eV
respectively. Will the photoelectric effect occur for either of these
elements (a) with incident light of wavelength 5650 Å and (b) with light
of wavelength 5180 Å
(4) The work function of tungsten is 4.50 ev. Calculate the speed of
fastest electron ejected from tungsten surface when light whose photon
energy is 5.80 eV shines on the surface.
5 If the work function for certain metal is 1.8 eV, (a) What is the
stopping potential for electrons ejected from metal when light of 4000 A
shines on the metal ? (b) What is the maximum speed of the ejected
electrons ?
6. The work function of caesium is 2.14 eV. Find a) the threshold
frequency for caesium and (b) the wavelength of the incident light if
photocurrent is brought to zero by stopping potential of 0.60 V.