A metal surface with work function $\phi$ is illuminated by monochromatic light of frequency $

u$. If the stopping potential is$V_0$, and the mass of an electron is$m$, the maximum speed of the emitted photoelectrons is:

In Lenard's experiment, the stopping potential for photoelectrons emitted from a metal surface illuminated by light of wavelength $\lambda_1$ is $V_1$. When the wavelength is changed to $\lambda_2$ ($\lambda_2 > \lambda_1$), the stopping potential becomes $V_2$. If the work function of the metal is $\phi$, which of the following relations is correct?

The collector plate in an experiment on photoelectric effect is kept vertically above the emitter plate. Light source is put on and a saturation photo current is recorded. An electric field is switched on which has a vertically downward direction

The electrons are emitted in the photoelectric effect from a metal surface

A metal plate gets heated when cathode rays strike against it due to

In Thomson mass spectrograph, singly and doubly ionised particles from similar parabola corresponding to magnetic fields of 0.8 T and 1.2 T for a constant electric field. The ratio of masses of ionised particles will be

In a photoelectric experiment, the incident light frequency is $3

u_0$, where$

u_0$is the threshold frequency. If the frequency is reduced to$1.5

u_0$ and the intensity is kept constant, how does the stopping potential change?

Planck’s constant has the dimensions of

When monochromatic radiation of intensity $I$ falls on a metal surface, the number of photoelectron and their maximum kinetic energy are $N$ and $T$ respectively. If the intensity of radiation is $2I,$ the number of emitted electrons and their maximum kinetic energy are respectively

When subjected to a transverse electric field, cathode rays move

Monochromatic light of wavelength $3000\mathop A\limits^ \circ$ is incident on a surface area 4 ${\rm{c}}{{\rm{m}}^2}$. If intensity of light is 150mW${{\rm{m}}^{ - 2}}$, then rate at which photones strike the target is