Question

In an unbiased $p-n$ junction, holes diffuse from the $p$-region to $n$-region because of

• A. The attraction of free electrons of $n$-region.
• B. The higher hole concentration in $p$-region than that in $n$-region.
• C. The higher concentration of electrons in the $n$-region than that in the $p$-region.
• D. The potential difference across the p-n junction.

Answer 1

Answer: (B)

The higher hole concentration in $p$-region than that in $n$-region.

Answer 2

The higher hole concentration is in $p$-region than that in $n$-region.