हिंदी

The graph shows the variation of photocurrent for a photosensitive metal What does X and A on the horizontal axis represent? - Physics

Advertisements
Advertisements

प्रश्न

The graph shows the variation of photocurrent for a photosensitive metal

  1. What does X and A on the horizontal axis represent?
  2. Draw this graph for three different values of frequencies of incident radiation ʋ1, ʋ2 and ʋ33 > ʋ2 > ʋ1) for the same intensity.
  3. Draw this graph for three different values of intensities of incident radiation I1, I2 and I3 (I3 > I2 > I1) having the same frequency.
आलेख

उत्तर

a. A - cut off or stopping potential

X - anode potential

b.

Variation of photoelectric current with collector plate potential for different frequencies of incident radiation.

c.

Variation of photocurrent with collector plate potential for different intensity of incident radiation.

shaalaa.com
Experimental Study of Photoelectric Effect
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2022-2023 (March) Sample

संबंधित प्रश्न

Monochromatic radiation of wavelength 640.2 nm (1 nm = 10−9 m) from a neon lamp irradiates photosensitive material made of caesium on tungsten. The stopping voltage is measured to be 0.54 V. The source is replaced by an iron source and its 427.2 nm line irradiates the same photo-cell. Predict the new stopping voltage.


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.


If an electron has a wavelength, does it also have a colour?


Planck's constant has the same dimensions as


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


A point source of light is used in a photoelectric effect. If the source is removed farther from the emitting metal, the stopping potential


Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelength of sodium light = 590 nm

(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 parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflecting plane mirror. The angle of incidence is 60° and the number of photons striking the mirror per second is 1.0 × 1019. Calculate the force exerted by the light beam on the mirror.

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


The figure is the plot of stopping potential versus the frequency of the light used in an experiment on photoelectric effect. Find (a) the ratio h/e and (b) the work function.


Why it is the frequency and not the intensity of the light source that determines whether the emission of photoelectrons will occur or not? Explain.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×