Photoelectric EffectMedium
Question
In a photoelectric experiment, the collector plate is at 2.0V with respected to the emitter plate made of copper ( = 4.5 eV). The emitter is illuminated by a source of monochromatic light of wavelength 200nm.
Options
A.The minimum kinetic energy of the photoelectrons reaching the collector is 0.
B.The maximum kinetic energy of the photoelectrons reaching the collector is 3.7 eV
C.If the polarity of the battery is reversed than answer to part A will be 0
D.If the polarity of the battery is reversed than answer to part B will be 1.7 eV
Solution
Kmax = 
Kmax = 1.7eV at anode
Kmax = (1.7 + 2) eV at anode
If polarity is revered, no e- reach at collector
Kmax = 1.7eV at anode
Kmax = (1.7 + 2) eV at anode
If polarity is revered, no e- reach at collector
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