Question

The tunnneling involves_______

(a) acceleration of electrons in p side

(b) movement of electrons from n side conduction band to p side valance band

(c) charge distribution managementin both the bands

(d) positive slope characteristics of diode

This question was posed to me during an interview.

Enquiry is from Tunnel Diodes and its Characteristics in portion Semiconductor-Diode Characteristics of Electronic Devices & Circuits

Answer 1

Correct choice is (b) movement of electrons from n side conduction band to p side valance band

To elaborate: Tunneling means a direct flow of electrons across small depletion region from N side conduction band to P side valance band. The electrons begin to accelerate in the N side of the semiconductor.