मराठी

Plot a Graph Showing the Variation of Photoelectric Current with Collector Plate Potential at a Given Frequency but for Two Different Intensities I1 And I2, Where I2 > I1. - Physics

Advertisements
Advertisements

प्रश्न

Plot a graph showing the variation of photoelectric current with collector plate potential at a given frequency but for two different intensities I1 and I2, where I2 > I1.

Advertisements

उत्तर

shaalaa.com
Einstein’s Photoelectric Equation: Energy Quantum of Radiation
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2013-2014 (March) Foreign Set 3

संबंधित प्रश्‍न

Light of wavelength 488 nm is produced by an argon laser which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping (cut-off) potential of photoelectrons is 0.38 V. Find the work function of the material from which the emitter is made.


In an accelerator experiment on high-energy collisions of electrons with positrons, a certain event is interpreted as annihilation of an electron-positron pair of total energy 10.2 BeV into two γ-rays of equal energy. What is the wavelength associated with each γ-ray? (1BeV = 109 eV)


Briefly explain the three observed features which can be explained by Einstein’s photoelectric equation.


Is p − E/c valid for electrons?


The frequency and intensity of a light source are doubled. Consider the following statements.

(A) The saturation photocurrent remains almost the same.
(B) The maximum kinetic energy of the photoelectrons is doubled.


The electric field at a point associated with a light wave is `E = (100  "Vm"^-1) sin [(3.0 xx 10^15 "s"^-1)t] sin [(6.0 xx 10^15 "s"^-1)t]`.If this light falls on a metal surface with a work function of 2.0 eV, what will be the maximum kinetic energy of the photoelectrons?

(Use h = 6.63 × 10-34J-s = 4.14 × 10-15 eV-s, c = 3 × 108 m/s and me = 9.1 × 10-31kg)


A small metal plate (work function φ) is kept at a distance d from a singly-ionised, fixed ion. A monochromatic light beam is incident on the metal plate and photoelectrons are emitted. Find the maximum wavelength of the light beam, so that some of the photoelectrons may go round the ion along a circle.


Use Einstein's photoelectric equation to show how from this graph,
(i) Threshold frequency, and
(ii) Planck's constant can be determined.


Each photon has the same speed but different ______.


The wavelength of a photon needed to remove a proton from a nucleus which is bound to the nucleus with 1 MeV energy is nearly ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×