मराठी
तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएचएससी विज्ञान इयत्ता १२

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 - Physics

Advertisements
Advertisements

प्रश्न

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)

पर्याय

  • < 2.75 × 10–9 m

  • ≥ 2.75 × 10–9 m

  • ≤ 2.75 × 10–12 m

  • < 2.5 × 10–10 m

MCQ
Advertisements

उत्तर

< 2.75 × 10–9 m

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 8: Dual Nature of Radiation and Matter - Evaluation [पृष्ठ १३५]

APPEARS IN

सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 12 TN Board
पाठ 8 Dual Nature of Radiation and Matter
Evaluation | Q I. 5. | पृष्ठ १३५

संबंधित प्रश्‍न

Find the (a) maximum frequency and (b) minimum wavelength of X-rays produced by 30 kV electrons.


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?

A diode value is connected to a battery and a load resistance. The filament is heated, so that a constant current is obtained in the circuit. As the cathode continuously emits electrons, does it become more and more positively charged?


Let i0 be the thermionic current from a metal surface when the absolute temperature of the surface is T0. The temperature is slowly increased and the thermionic current is measured as a function of temperature. Which of the following plots may represent the variation in (i/i0) against (T/T0)?


The anode of a thermionic diode is connected to the negative terminal of a battery and the cathode to its positive terminal.


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


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


Why do metals have a large number of free electrons?


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


A 150 W lamp emits light of the mean wavelength of 5500 Å. If the efficiency is 12%, find out the number of photons emitted by the lamp in one second.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×