The maximum kinetic energy Kmaxof photo-electrons emitted in a photoelectric cell is measured using lights of various frequencies v,. The slope of the graph is equal to 

The maximum kinetic energy Kmaxof photo-electrons emitted in a photoelectric cell is measured using lights of various frequencies v,. The slope of the graph is equal to
 

  1. A

     charge on an electron
     

  2. B

     work-function of emitter

  3. C

    velocity of photon
     

  4. D

     Planck's constant

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    Solution:

    hv=W0+(K.E.) or  K.E. =Kmax=hvW0 comparing with y = m x +C we find that m =h (planck's constan)

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