Question

name two factors which can enhance thermionic emission

Answer 1

Rate of thermionic emission depends upon the nature of the metal used, temperature and surface area of the metal. By increasing the temperature and surface area of the cathode, rate of thermionic emission can be increased.

Answer 2

Heya Friend ☺

There is your answer
------------------------------
Thermionic emission can be enhanced by increasing the temperature of surface emitting thermions.
Thermionic emission can be enhanced by increasing the surface area of surface emitting thermions.

Hope it helped you