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

If a source of monochromatic light with a wavelength of 550 nm emits $2.2 imes 10^{-3}$ W of power, what is the approximate number of photons emitted per second? (Consider $h = 6.6 imes 10^{-34}$ Js)

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

In Lenard's experiment, if the intensity of the incident light is increased while keeping the frequency constant, what happens to the stopping potential?

In Lenard's experiment, a metal with a work function of 2.0 eV is illuminated by light of frequency $6 imes 10^{14}$ Hz. What is the kinetic energy of the emitted photoelectrons? (h = $6.63 imes 10^{-34}$ Js)

A photo-sensitive material would emit electrons, if excited by photons beyond a threshold. To overcome the threshold, one would increase the

In Lenard's experiment, the stopping potential is found to be 2V. If the work function of the metal is 2eV, what is the frequency of the incident light? (h = $6.63 imes 10^{-34}$ Js)

When subjected to a transverse electric field, cathode rays move

When a cathode ray tube is operated at 2912 V, the velocity of electrons is

$3.2 imes {10^7}$ m/s. Find the velocity of cathode ray if the tube is operated at 5824 V

The number of photo-electrons emitted per second from a metal surface increases when

The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejected photoelectrons was found to be 1.68 eV. The work function of the metal is $\left( {hc\; = 1240\;eV - {\rm{nm}}} \right)$