Light of wavelength` 2 xx 10^-7 m` incident on the cathode of a photocell. The current in the photocell is reduced to zero by a stopping potential of 2V. Find the threshold avelength of a cathode.

The photoelectric work function of the emitter of photoelectric cell is 2 eV.Whenemitter is irradiated by monochromatic light of certain wavelength, the photoelectric current can just be reduced to zero by applying stopping potential of 1.5 V. Find the wavelength of incident light.

The work function of caesium is 2.14 eV. Find the wavelength of the incident light if photocurrent is brought to zero by stopping potential of 0.60 V.

The photoelectric work function of the emitter of a photoelectric cell is 2 eV. When the emitter is irradiated by monochromatic light of certain wavelength,the photoelectric current can just be reduced to zero by applying a stopping potential of 1.5 volt. Determine the wavelength of incident .

When light of frequency v_1 incident on a metal with work function W_0 (where hv_1 gt W_0), the photocurrent falls to zero at a stopping potential of V_1. If the frequency of light is increased to v_2, the stopping potential changes to V_2. Therefore, the charge of an electron is given by

By stopping potential of 2 V, photoelectric current in photocell reduces to zero when cathode is exposed to light of wavelength 4000overset@ A . Calculate the work function of cathode surface..

The photoelectric current in a photoelectric cell can be reduced to zero by a stopping potential of 1.8 volt. Monochromatic light of wavelength 2200 overset(@)(A) is incident on the cathode. Find the maximum kinetic energy of the photoelectrons in joules. [Charge on electron = 1.6 xx 10^-19 C ]

When a metallic surface is illuminated with radiation of wavelength lambda , the stopping potential is V . If the same surface is illuminated with radiation of wavelength 2 lambda , the stopping potential is (V)/(4) . The threshold wavelength surface is :

A surface receives light of wavelength lambda_1=450 nm, causing the ejection of photo-electrons for which the stopping potential is V_(S_1)=0.2 V. If the radiations of wavelength lambda_2=120 nm are now incident on the surface, the threshold frequency for the surface is