Question on: JAMB Physics - 1994
If light with photon energy 2eV is incident suitably on the surface of a metal with work function 3eV, then
A
no electron will be emitted
B
the few electrons emitted will have a maximum kinetic energy of 1eV
C
the few electrons emitted will have a maximum kinetic energy of 3eV
D
many electrons will be emitted
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Correct Option: A
An electron can only be emitted if photon energy is equal or greater than work function of the plate
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