Home
Class 12
PHYSICS
Photo-electrons are produced from a met...

Photo-electrons are produced from a metal surface using a radiation of wavelength `6561Å` . These photo-electrons, when made to enter a uniform magnetic field of intensity `3 xx 10^(-4)` T, move along different circular paths with a maximum radius of 10mm, then the work function of the metal is close to

A

3.1eV

B

0.1eV

C

2.1eV

D

1.1eV

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

Radiation, with wavelenght 6561 Å falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of 3 xx 10^(-4) T. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to:

The radiation corresponding to 3 rarr 2 transition of hydrogen atom falls on a metal surface to produce photoelectrons . These electrons are made to enter circuit a magnetic field 3 xx 10^(-4) T if the ratio of the largest circular path follow by these electron is 10.0 mm , the work function of the metal is close to

Photons of wavelength 6556 A^@ falls on a metal surface. If ejected electrons with maximum K.E. moves in magnetic field of 3 xx 10^(-4) T in circular orbit of radius 10^(-2) m, then work function of metal surface is

If an electron is moving in a magnetic field of 5.4 xx 10^(-4)T on a circular path of radius 32 cm having a frequency of 2.5 MHz, then its speed will be

Light of wavelength 180 nm ejects photoelectrons from a plate of metal whose work - function is 2 eV. If a uniform magnetic field of 5xx10^(-5) T be applied parllel to the palte, what would be the radius of the path followed by electrons ejected normally from the plate with maximum energy.

Light of wavelength 180 nm ejects photoelectrons from a plate of metal whose work - function is 2 eV. If a uniform magnetic field of 5xx10^(-5) T be applied parallel to the plate, what would be the radius of the path followed by electrons ejected normally from the plate with maximum energy.

A beam of protons enters a uniform magnetic field of 0.3T with velocity of 4xx10^5m//s in a direction making an angle of 60^(@) with the direction of magnetic field. The path of motion of the particle will be

Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold frequency ( v_0) and work function (W_0) of the metal.

A photon of energy E ejects a photoelectron from a metel surface whose work function is phi_(0) . If this electron enters into a unifrom magnetic field of induction B in a direction perpendicular to the field and describes a circular path of radius r, then the radius r, is given by, (in the usual notation)

When light of wavelangth 4000 Å is incident on a barium emitter , emitted photo electrons in a transverse magnetic field strength B = 5.2 xx 10^(-6) T moves in a circular path . Find the radius of the circle . Given work function of barium is 2.5 eV and mass of electron is 9.1 xx 10^(-31) kg . e = 1.6 xx 10^(-19) C , h = 6.6 xx 10^(34) Js .