When wavelength of incident photon is decreased then
Velocity of emitted photo-electron decreases
Velocity of emitted photoelectron increases
Velocity of photoelectron do not charge
Photo electric current increases
According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is
The energy equivalent to $1\,mg$ of matter in $MeV$ is
Energy conversion in a photoelectric cell takes place from
Rest mass energy of an electron is $0.51\ MeV.$ If this electron is moving with a velocity $0.8\ c$ (where $c$ is velocity of light in vacuum), then kinetic energy of the electron should be. ........... $MeV$
A 1$\mu$ $A$ beam of protons with a cross-sectional area of $0.5$ sq. mm is moving with a velocity of $3 \times {10^4}m{s^{ - 1}}$. Then charge density of beam is