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The anode voltage of a photocell is kept fixed. The wavelength of the light falling on the cathode is gradually changed. The plate current
of the photocell varies as follows -
Option: 1
Option: 2
Option: 3
Option: 4
Answers (1)
When wavelength increases then energy of photon decreases so current also decreases, because less electrons are emitted from depth of metal.
View full answer
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