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JEE PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER
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Medium
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Analyzing
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Consider the two following statements I and II, and identify the correct choice given in the answers
III. In photovoltaic cells the photoelectric current produced is not proportional to the intensity of incident light.
IV. In gas filled photoemissive cells, the velocity of photoelectrons depends on the wavelength of the incident radiation.
III. In photovoltaic cells the photoelectric current produced is not proportional to the intensity of incident light.
IV. In gas filled photoemissive cells, the velocity of photoelectrons depends on the wavelength of the incident radiation.
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Correct option: D
I is false but II is true
Option D (I is false but II is true) is correct because the photoelectric current in photovoltaic cells is proportional to the intensity of incident light, and the velocity of photoelectrons in gas-filled photoemissive cells depends on the wavelength of incident radiation.
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(i) the energy of the incident photons
(ii) the maximum kinetic energy of the photoelectrons emitted. An electron is accelerated by a potential difference of V volt to acquire kinetic energy equal to maximum kinetic energy of ejected photoelectron from a metal of work function 3.2 eV, using a light of wavelength Value of V is Two monochromatic beams and of equal intensity , hit a screen. The number of photons hitting the screen by beam is twice that by beam . Then, what can inference you about their frequencies? A 5 W source emits monochromatic light of wavelength . When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1.0m, the number of photoelectrons liberated will be reduced by a factor of