First slide

Photo Electric Effect

Question

    Consider the two following statements A and B and identify the correct choice given in the answers.
   A) In photo voltaic cells photo electric current produced is not proportional to the intensity of incident light.
   B) In gas filled photoemissive cells, the velocity of photo electrons depends on the wave length of the incident radiation

Easy

A

Both A & B are true
B

Both A & B are false
C

A is true but B is false
D

A is false but B is true

Solution

Photoelectric current depends on Intensity of incident radiation ( $i \propto I$ )
Maximum kinetic energy or speed of photoelectrons emitted depends on frequency or wavelength of incident radiation

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