English

A metallic plate exposed to white light emits electrons. For which of the following colours of light, the stopping potential will be maximum? - Physics

Advertisements
Advertisements

Question

A metallic plate exposed to white light emits electrons. For which of the following colours of light, the stopping potential will be maximum?

Options

  • Blue

  • Yellow

  • Red

  • Violet

MCQ

Solution

Violet

Explanation:

The higher the frequency, the greater the stopping potential.

shaalaa.com
Experimental Study of Photoelectric Effect
  Is there an error in this question or solution?
2023-2024 (March) Board Sample Paper

RELATED QUESTIONS

The photoelectric cut-off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted?


The work function for the following metals is given: 

Na: 2.75 eV; K: 2.30 eV; Mo: 4.17 eV; Ni: 5.15 eV

Which of these metals will not give photoelectric emission for a radiation of wavelength 3300 Å from a He-Cd laser placed 1 m away from the photocell? What happens if the laser is brought nearer and placed 50 cm away?


Light of intensity 10−5 W m−2 falls on a sodium photo-cell of surface area 2 cm2. Assuming that the top 5 layers of sodium absorb the incident energy, estimate time required for photoelectric emission in the wave-picture of radiation. The work function for the metal is given to be about 2 eV. What is the implication of your answer?


Draw graphs showing variation of photoelectric current with applied voltage for two incident radiations of equal frequency and different intensities. Mark the graph for the radiation of higher intensity.


A hot body is placed in a closed room maintained at a lower temperature. Is the number of photons in the room increasing?


Planck's constant has the same dimensions as


Two photons of 


If the frequency of light in a photoelectric experiment is doubled, the stopping potential will ______.


The collector plate in an experiment on photoelectric effect is kept vertically above the emitter plate. A light source is put on and a saturation photocurrent is recorded. An electric field is switched on that has a vertically downward direction.


Find the maximum magnitude of the linear momentum of a photoelectron emitted when a wavelength of 400 nm falls on a metal with work function 2.5 eV.

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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×