Photoelectric Effect MCQ

Test your knowledge with important Photoelectric Effect MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Photoelectric Effect MCQs at Bissoy

• For the photoelectric effect in sodium, the figure shows the plot of cut-off voltage versus frequency of incident radiation. The threshold frequency is __________
  ক

  6.5 X 1014 Hz

  খ

  4.5 X 1014 Hz

  গ

  3 X 1014 Hz

  ঘ

  5 X 1014 Hz
• On which part of the photoelectric cell does the radiation strikes?
  ক

  Cathode

  খ

  Anode

  গ

  Ammeter

  ঘ

  Radiation does not strike on the photoelectric cell
• Which of the following gases are filled inside the Photoelectric cells?
  ক

  Carbon Dioxide

  খ

  Nitrogen

  গ

  Neon

  ঘ

  Oxygen
• What is the effect of intensity on the stopping potential?
  ক

  As intensity increases, stopping potential increases linearly

  খ

  As intensity increases, stopping potential decreases linearly

  গ

  As intensity decreases, stopping potential increases exponentially

  ঘ

  No effect
• Identify the correct order of frequencies.
  ক

  v1 > v2 > v3

  খ

  v2 > v3 > v1

  গ

  v3 > v2 > v1

  ঘ

  v1 > v3 > v2
• The photoelectric emission could be explained by the ____________
  ক

  Wave nature of light

  খ

  Particle nature of light

  গ

  Dual nature of light

  ঘ

  Quantum nature
• How does the intensity affect the photoelectric current?
  ক

  As intensity increases, the photoelectric effect increases

  খ

  As the intensity increases, the photoelectric effect decreases

  গ

  As the intensity decreases, the photoelectric effect becomes twice

  ঘ

  No effect
• What is the time lag between the incidence of photons and the ejection of photoelectrons?
  ক

  Greater than 10-5 s

  খ

  Between 10-5 s and 10-9 s

  গ

  Less than 10-9 s

  ঘ

  1 second
• What is the relation between the interaction parameter, ‘b’, and atomic radius, R, for the Photoelectric effect?
  ক

  b > R

  খ

  b ≈ R

  গ

  b < R

  ঘ

  no relation between b and R
• During Einstein’s Photoelectric Experiment, what changes are observed when the frequency of the incident radiation is increased?
  ক

  The value of saturation current increases

  খ

  No effect

  গ

  The value of stopping potential increases

  ঘ

  The value of stopping potential decreases
• Give the unit of work function.
  ক

  Electron volt

  খ

  Joule

  গ

  Hertz

  ঘ

  Watt
• Photoelectric emission is possible at all frequencies.
  ক

  True

  খ

  False
• Which radiations will be most effective for the emission of electrons from a metallic surface?
  ক

  Microwaves

  খ

  X rays

  গ

  Ultraviolet

  ঘ

  Infrared
• Why are alkali metals most suited as photo-sensitive metals?
  ক

  High frequency

  খ

  Zero rest mass

  গ

  High work function

  ঘ

  Low work function
• What happens to the wavelength of a photon after it collides with an electron?
  ক

  Increases

  খ

  Decreases

  গ

  Remains the same

  ঘ

  Infinite
• Which photon is more energetic: A red one or a violet one?
  ক

  Both

  খ

  Red

  গ

  Violet

  ঘ

  Neither