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JEE Main 2005 Physics question

PhysicsDual Nature of Matter and RadiationJEE Main 2005

A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed m away, the number of electrons emitted by photo cathode would

Answer: (2)

Solution

For a point source, intensity ; halving the distance increases the intensity 4

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Question ID VK-038579