Statement (I): By increasing the potential difference between cathode and anode continuously in a photoelectric experiment, the photo current always increases continuously.
Statement (II): If two photons A and B of energies 2.5 
and 
respectively fall on a metal surface of work function 
, then the ratio of maximum kinetic energies emitted between A and B is 3 .
Statement (III): The maximum energy needed by an electron to come out from metal surface is called the work function of the metal.
Which of the following is correct?
Text Solution
Verified by ExpertsD
Photocurrent will become constant after a certain potential difference between cathode and anode.
So, (I) is incorrect
Now, 
So, (II) is incorrect
Work function is minimum energy needed to eject the electron.
So, (III) is in correct.
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