Physics-
General
Easy

Question

A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photo current (i) with distance (d) of the source from the emitter

  1. a    
  2. b    
  3. c    
  4. d    

The correct answer is: d


    I proportional to fraction numerator 1 over denominator d to the power of 2 end exponent end fraction and photo current i proportional to I Þ i proportional to fraction numerator 1 over denominator d to the power of 2 end exponent end fraction

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