Question

In the mechanism of electron emission, what happens after surface positive ions hold free electrons inside the metal?

विकल्प

• The process is called electron emission before energy is supplied.

• External energy is supplied to an electron.

• Every electron immediately escapes.

• Electrical conduction stops.

Answer 1

The metal first contains free electrons held inside by surface positive ions. Supplying external energy gives an electron a chance to overcome that attraction.