Question

Which break down is an instrinsic break down
a) Avalanche break down
b) Thermal break down
s Electrochemical Breakdown
d) Discharge breakdown​

Answer 1

intrinsic breakdown occurs in time of the order of 10-8s and therefore is assumed to be electronic in nature. The initial density of conduction (free) electrons is also assumed to be large, and electron-electron collisions occur.

I guess it's Electrochemical breakdown