Question

In the equilibrium state, the barrier potential across a unbiased silicon diode is _________

(a) 0.3 V

(b) 0.7 V

(c) 1.3 V

(d) 0 V

The question was posed to me in a job interview.

My question is from Power Diodes-2 topic in section Diodes of Power Electronics

Answer 1

Right option is (b) 0.7 V

Easy explanation: Barrier potential is due to the charges that establish an electric field across the two junctions.