Question

When a physical contact between a p-region & n-region is established which of the following is most likely to take place?

(a) Electrons from N-region diffuse to P-region

(b) Holes from P-region diffuse to N-region

(c) Both of the above mentioned statements are true

(d) Nothing will happen

This question was addressed to me in a dream while sleeping

Enquiry is from The P-N Junction topic in section Diodes of Power Electronics

Answer 1

The correct answer is (c) Both of the above mentioned statements are true

The explanation is: When p & n region come together diffusion takes places & a depletion region is established with opposite charges on both the sides of the junction.