Explanation
Cathode rays are beam of electrons.
When a metal is heated, electrons are ejected out of it, which are called thermions.
Photoelectric effect is accounted by particle like behaviour of light ( ie by quantum theory of light ).
The photocurrent increases with the intensity of light other options are wrong.
Photoelectrons are emitted when zinc plate is irradiated with light.
As Emax ∝ V; so on increasing V, energy of incident electron increases. Due to which X – rays produced will be of higher energy.
Stopping potential depends upon the frequency of the incident light and nature of cathode material.
Radiowave has the highest wavelength and hence minimum frequency.
The increases in the number of electrons striking the anode in X – ray tube well increase the no. of photons increase i.e intensity of X – rays.
Cathode rays are deflected by electric field.
Ek = hv − W0 ;comparing it with the equation of straight line ,
y=mx+c we have slope of the line in the graph is h; the plank’s constant.
Please disable the adBlock and continue. Thank you.