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What is the effect of increasing the work function of a metal on the photoelectr

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Question: What is the effect of increasing the work function of a metal on the photoelectric effect?

Options:

  1. More electrons are emitted
  2. Fewer electrons are emitted
  3. The frequency of light must be increased
  4. Both B and C are correct

Correct Answer: Both B and C are correct

Solution: 

Increasing the work function means that a higher frequency of light is required to emit electrons, resulting in fewer electrons being emitted for a given frequency of light.

What is the effect of increasing the work function of a metal on the photoelectr

Practice Questions

Q1
What is the effect of increasing the work function of a metal on the photoelectric effect?
  1. More electrons are emitted
  2. Fewer electrons are emitted
  3. The frequency of light must be increased
  4. Both B and C are correct

Questions & Step-by-Step Solutions

What is the effect of increasing the work function of a metal on the photoelectric effect?
  • Step 1: Understand what the work function is. The work function is the minimum energy needed to remove an electron from a metal.
  • Step 2: Know that light can provide energy to electrons. When light hits a metal, it can give energy to the electrons.
  • Step 3: Realize that different colors (frequencies) of light have different energies. Higher frequency light has more energy.
  • Step 4: If the work function increases, it means that more energy is needed to remove an electron.
  • Step 5: Since more energy is needed, only light with a higher frequency (more energy) can emit electrons.
  • Step 6: If you use light with a lower frequency (less energy), fewer or no electrons will be emitted because they don't have enough energy to overcome the increased work function.
  • Step 7: Therefore, increasing the work function results in fewer electrons being emitted for a given frequency of light.
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