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Photoelectric effect

  1. May 12, 2009 #1
    1. The problem statement, all variables and given/known data

    1. If frequency is constant and intencity of light is doubled what happen to the current?
    2. If frequency is constant and intencity of light is doubled what happen to the voltage?
    3. If intencity is constnat and frequency of light is doubled what happen to the current?
    4. If intencity is constnat and frequency of light is doubled what happen to the voltage?

    2. Relevant equations

    E = hf

    3. The attempt at a solution

    I know the intencity of light is proportional to the number of photons
    and frequency of light is is proportional to the energy of photons
    So my answer is

    1. current doubled
    2. no change
    3. no change
    4. voltage doubled

    am I right?
     
  2. jcsd
  3. May 12, 2009 #2
    yes, you are, though would the voltage be exactly doubled with the frequency bieng doubled? Think about the work function and try it mathematically.
     
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