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Which of the following graphs is correct...

Which of the following graphs is correct with respect to phtotelectric effect ?
Where v `to` Frequency of EMR
`KE_(max) to ` Maximum kinetic energy of photon-electron
`I to ` Intensity of EMR ltbr. `V_(S.P.) to ` Stopping potential
`n_(PE) to ` Number of photon electron

A

B

C

D

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