When an inert gas is filled in place vacuum in a photo cell, then

English

Gujarati

Hindi

11.Dual Nature of Radiation and matter

easy

When an inert gas is filled in the place vacuum in a photo cell, then

A

Photo-electric current is decreased

B

Photo-electric current is increased

C

Photo-electric current remains the same

D

Decrease or increase in photo-electric current does not depend upon the gas filled

Solution

(b) In the presence of inert gas photoelectrons emitted by cathode ionise the gas by collision and hence the current increases.

Standard 12

Physics

Share

Similar Questions

In photoelectric effect, the K.E. of electrons emitted from the metal surface depends upon

easy

Assertion : Photoelectric saturation current increases with the increase in frequency of incident light.
Reason : Energy of incident photons increases with increase in frequency and as a result photoelectric current increases.

easy

(AIIMS-2015)

According to photon theory of light which of the following physical quantities associated with a photon do not/does not change as it collides with an electron in vacuum

easy

A Laser light of wavelength $660\,nm$ is used to weld Retina detachment. If a Laser pulse of width $60\, ms$ and power $0.5\, kW$ is used the approximate number of photons in the pulse are : [Take Planck's constant $h\, = 6.62\times10^{- 34}\, Js$]

medium

(JEE MAIN-2017)

What is the energy of photon whose wavelength is $6840\,\mathop A\limits^o $ ?……$eV$

medium

(AIIMS-2007)