A photo cell is illuminated by a small bright source placed 1m away When the same source of light is placed 2m away, the electrons emitted by photo ca

Question

A photo cell is illuminated by a small bright source placed 1m away When the same source of light is placed 2m away, the electrons emitted by photo ca

A photo cell is illuminated by a small bright source placed 1m away When the same source of light is placed 2m away, the electrons emitted by photo cathode
A. carry one quarter of their previous energy
B. carry one quarter of their previous momenta
C. are half as numerous
D. are one quarter as numerous

Monjur Alahi

8 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - d
`Iprop(1)/(d^(2))`
When source is placed 2m away then `I=I//4` The number of electrons emitted is derectly proportional to intensity .Hence number of emitted electrons is reduced to one fourth

8 views Answered 2023-02-05 15:29