Q .     Suppose a beam of electrons with each
electron having energy `E_(0)` incident on a metal
surface kept in an evacuated chamber. Then,

VIT 2015
A

electrons can be emitted with any energy with a maximum of `E_0`

B

no electrons will be emitted as only photons can emit electrons

C

electrons can be emitted but all with an energy `E_0`

D

electrons can be emitted with any energ with a maximum of `E_0 - phi`, where `phi` being work function

HINT

The emitted electrons may lie near the surface and so can have a maximum amount of energy `E_0`.

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