Question

If no external voltage is applied across P-N junction, there would be

• A. No electric field across the junction
• B. An electric field pointing from N-type to P-type side across the junction
• C. An electric field pointing from P-type to N-type side across the junction
• D. A temporary electric field during formation of P-N junction that would subsequently disappear

Answer 1

Answer: (B)

An electric field pointing from N-type to P-type side across the junction

Answer 2

Across the $P - N$ junction, a barrier potential is developed whose direction is from $N$ region to $P$ region.