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Grade 12Modern Physics

A point source of monochomatic light is at a distance of 0.2m from the photoelectric cell,the stopping potential and saturation current are 0.6V and 18mA respectively.

If the same source is placed 0.6m away from the photoelectric cell,then,

which of the following is correct and why.............

1)stopping potential is 0.2V

2)stopping potential is 0.6V

3)saturation current is 9mA

4)saturation current is 15mA

(Pls explain.......)

Profile image of vishwajit pureti
15 Years agoGrade 12
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1 Answer

Profile image of Geoffrey Richards
ApprovedApproved Tutor Answer15 Years ago

The ans is option(2) bcos as the distance increase the intensity or brightness decreses but the frequency it remains the same ....

Dats y the right ans is option (2) ....

 

btw are u preparing for aieee-2011 .../??