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In the photoelectric effect, what happens to the kinetic energy of emitted elect

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Question: In the photoelectric effect, what happens to the kinetic energy of emitted electrons if the intensity of light is increased while keeping frequency constant?

Options:

  1. Increases
  2. Decreases
  3. Remains the same
  4. Becomes zero

Correct Answer: Remains the same

Solution: 

The kinetic energy of emitted electrons remains the same as it depends on the frequency, not intensity.

In the photoelectric effect, what happens to the kinetic energy of emitted elect

Practice Questions

Q1
In the photoelectric effect, what happens to the kinetic energy of emitted electrons if the intensity of light is increased while keeping frequency constant?
  1. Increases
  2. Decreases
  3. Remains the same
  4. Becomes zero

Questions & Step-by-Step Solutions

In the photoelectric effect, what happens to the kinetic energy of emitted electrons if the intensity of light is increased while keeping frequency constant?
  • Step 1: Understand the photoelectric effect. This is when light hits a material and causes it to emit electrons.
  • Step 2: Know that the energy of the emitted electrons depends on the frequency of the light, not the intensity.
  • Step 3: Remember that frequency is how fast the light waves oscillate, while intensity is how bright the light is.
  • Step 4: If you keep the frequency of the light the same and only increase the intensity, you are making the light brighter but not changing its frequency.
  • Step 5: Since the kinetic energy of the emitted electrons depends only on the frequency, it will stay the same even if the intensity increases.
  • Photoelectric Effect – The phenomenon where electrons are emitted from a material when it is exposed to light of sufficient frequency.
  • Kinetic Energy of Electrons – The energy of emitted electrons is determined by the frequency of the incident light, not its intensity.
  • Intensity vs. Frequency – Intensity relates to the number of photons hitting the surface, while frequency determines the energy of each photon.
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