The surface of a potassium metal is irradiated with ultraviolet rays of W.L. 300 nanometer. Work function of the potassium is 2 eV. Find the maximum K.E. of the emitted photoelectrons.

How does the maximum K.E. of electron emitted vary with work function of the metal?

Work function of nickel is 5.01 eV. When ultraviolet radiation of wavelength 200 Å is incident on it, electrons are emitted. What will be the maximum velocity of emitted electrons?

Light of wavelength 3500 Å is incident on two metal surface A and B . Will both the metal surface yield photoelectrons, if their work function are 4.2 eV and 1.9 eV respectively? What is the kinetic energy of the fastest electron?

The work function of a metallic surface is 2.5 eV. Ultraviolet light of wavelength 2000Å is allowed to be incident on the metallic surface. Calculate Stopping potential. (Given Planck's constant h = 6.63 xx 10^(-34) J-s , electronic charge e = 1.6 xx 10^(-19) C, electron mass m = 9.1 xx 10^( -31) kg

The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6 eV fall on it is 4 eV. Find the stopping potential in volts.

The work function of Al is 4.2 eV. Find the W.L . Of the incident light if the photo current is brought to zero by a stopping potential of 0.80 eV.

A photo electric surface has work function 2eV. What is the maximum kinetic energy of the emitted photoelectrons ejected by light by wavelength 3000overset(@)A Given h=6.6xx10^(-34)J-S,e=1.6xx10^(-19)C . m_e=9g0^(-31)kg,C = 3xx10^8m//sec