Home
Class 12
PHYSICS
A metal of work function 4eV is cexposed...

A metal of work function `4eV` is cexposed to a radiation of wavelegth `140xx10^(-9)m`. Find the stopping potential.

A

`6.42V`

B

`2.94V`

C

`4.86V`

D

`3.2V`

Text Solution

Verified by Experts

The correct Answer is:
C
`V_(0)=[[(12400)/(lambda"in"A^(0))-omega_(0)]]/e`
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-II (H.W)|17 Videos

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-I(H.W)|7 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise ASSERTION AND REASON|15 Videos

  • ELECTRIC CHARGES AND FIELDS

    NARAYNA|Exercise EXERCISE -4|43 Videos

Similar Questions

Explore conceptually related problems

A metal surface of work function 1.07 eV is irradiated with light of wavelength 332 nm . The retarding potential required to stop the escape of photo - electrons is

The photoelectric work function for potassium is 2 eV . The light of wavelength 3.6 xx 10^(-7) m falls on potassium . The stopping potential is

An electron of work function 1.4 eV is emitted with a velocity 5 xx 10^(6) m/s . The wavelength of the incident radiation is

In the arrangement shown if Fig. y=1.0mm , d=0.24mm and D=1.2m . The work function of the material of the emitter if 2.2 eV. Find the stopping potential V needed to stop photocurrent (in xx10^(-1) V).

The work function of a metal is 4.0 eV . If the metal is irradiated with radiation of wavelength 200 nm, then the maximum kinetic energy of the photoelectrons would be about.

The work function of a metal is 3.0eV .It is illuminated by a light of wave length 3xx10^(7)m .Calculate i) threshold frequency, ii)the maximum energy of photoelectrons, iii) the stopping potential. (h=6.63xx10^(-34)Js and c=3xx10^(8)ms^(-1))

0.24eV of energy is required to stop photoelectron emitted by radiation of wavelength 2480 Å . Find work function of metal used?

A radiation is incident on a metal surface of work function 2.3 eV. The wavelength of incident radiation is 60 nm, then the number of photoelectrons is

Light of wavelength 3320 Å incidents on metal surface (work function = 1.07 eV ). To stop emission of photo electron, retarding potential required to be -

The stopping potential for the photoelectrons emitted from a metal surface of work function 1.7 eV is 10.4 V. Find the wavelength of the radiaiton used. Also, identify the energy levels in hydrogen atom, which will emit this wavelength.