In Lenard's experiment for photo electric effect Nickel surface is irradiated by ultraviolet light of wavelength 200nm.Work function of Ni is 5eV .If the collector is given +5V w.r.t.to the emitter (Ni) then the range of kinetic energy of electrons on reaching the collector will be

What P.D. must be applied to stop the fastest photo electron emitted by a nickel surface when illuminated by ultraviolet light of wave length 2000^(@)A . The work function of nickel is 5 eV

Ultraviolet light of wavelength 280 nm is used in an experiment on photoelectric effect with lithium ( varphi = 2.5 eV) cathode. Find (a) the maximum kinetic energy of the photoelectrons and (b) the stopping potential.

In an experiment on photoelectric effect the frequency f of the incident light is plotted against the stopping potential V_(0) . The work function of the photoelectric surface is given by ( e is the electronic charge)

In an experiment on photoelectric effect light of wavelength 400 nm is incident on a metal plate at rate of 5W. The potential of the collector plate is made sufficiently positive with respect to emitter so that the current reaches the saturation value. Assuming that on the average one out of every 10^6 photons is able to eject a photoelectron, find the photocurrent in the circuit.

If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength i, then for 1.5 p momentum of the photoelectron, the wavelength of the light should be (assume kinetic energy of ejected photoelectron to be very high in comparison to work function):

Work function of a metal surface is phi=1.5eV . If a light of wavelength 5000Å falls on it then the maximum K.E. of ejected electron will be-

In an experiment tungsten cathode which has a threshold 2300 Å is irradiated by ultraviolet light of wavelength 1800Å . Calculate (i) Maximum energy of emitted photoelectron and (ii) Work function for tungsten. (Mention both the results in electron-volts) Given Planck's constant h=6.6 xx 10^(-34) J-sec , 1eV = 1.6 xx 10^(-19) J and velocity of light c= 3xx10^(8)m//sec

In a photoelectric experiment, the collector plate is at 2.0 V with respect to the emitter plate made of copper phi = 4.5 . The emitter is illuminated by a source of monochromatic light of wavelength 200nm. Find the minimum and maximum kinetic energy of the photoelectrons reaching the collector.

A metal surface of work function 1.07 eV is irradiated with light of wavelength 332 nm . The retarding potential required to stop the escape of photo - electrons is

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