English
Tamil Nadu Board of Secondary EducationHSC Science Class 12

The wave associated with a moving particle of mass 3 × 10–6 g has the same wavelength as an electron moving with a velocity 6 × 106 ms–1. The velocity of the particle is - Physics

Advertisements
Advertisements

Question

The wave associated with a moving particle of mass 3 × 10–6 g has the same wavelength as an electron moving with a velocity 6 × 106 ms–1. The velocity of the particle is

Options

  • 1.82 × 10–18 ms–1

  • 9 × 10–2 ms–1

  • 3 × 10–31 ms–1

  • 1.82 × 10–15 ms–1

MCQ
Advertisements

Solution

1.82 × 10–15 ms–1

shaalaa.com
  Is there an error in this question or solution?
Chapter 8: Dual Nature of Radiation and Matter - Evaluation [Page 135]

APPEARS IN

Samacheer Kalvi Physics - Volume 1 and 2 [English] Class 12 TN Board
Chapter 8 Dual Nature of Radiation and Matter
Evaluation | Q I. 3. | Page 135

RELATED QUESTIONS

The work function of caesium metal is 2.14 eV. When light of frequency 6 × 1014 Hz is incident on the metal surface, photoemission of electrons occurs. What is the

  1. maximum kinetic energy of the emitted electrons,
  2. Stopping potential, and
  3. maximum speed of the emitted photoelectrons?

Quarks inside protons and neutrons are thought to carry fractional charges [(+2/3)e; (–1/3)e]. Why do they not show up in Millikan’s oil-drop experiment?


How does one explain the emission of electrons from a photosensitive surface with the help of Einstein's photoelectric equation?


Would you prefer a material with a high work-function or a low work-function to be used as a cathode in a diode?


The constant A in the Richardson−Dushman equation for tungsten is 60 × 104 A m−2K−2. The work function of tungsten is 4.5 eV. A tungsten cathode with a surface area 2.0 × 10−5 m2 is heated by a 24 W electric heater. In steady state, the heat radiated by the heater and the cathode equals the energy input by the heater and the temperature becomes constant. Assuming that the cathode radiates like a blackbody, calculate the saturation current due to thermions. Take Stefan's Constant = 6 × 10−8 W m−2 K−1. Assume that the thermions take only a small fraction of the heat supplied.


If a light of wavelength 330 nm is incident on a metal with work function 3.55 eV, the electrons are emitted. Then the wavelength of the wave associated with the emitted electron is (Take h = 6.6 × 10–34 Js)


Emission of electrons by the absorption of heat energy is called ____________ emission.


Define the work function of a metal. Give its unit.


What do you mean by electron emission? Explain briefly various methods of electron emission.


The work function of a metal is 2.31 eV. Photoelectric emission occurs when the light of frequency 6.4 × 1014 Hz is incident on the metal surface. Calculate

  1. the energy of the incident radiation,
  2. the maximum kinetic energy of the emitted electron and
  3. the stopping potential of the surface.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×