The collector plate in an experiment on photoelectric effect is kept vertically above the emitter plate. Light source is put on and a saturation photo current is recorded. An electric field is switched on which has a vertically downward direction
Text Solution
Verified by ExpertsThe correct answer is:
B
In electric field photoelectron will experience force and accelerate opposite to the field so it’s K.E. increases (i.e. stopping potential will increase), no change in photoelectric current, and threshold wavelength.
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