A certain `p-n` junction, having a depletion region of width `20 mum`, was found to have a breakdown voltage of 100 V. If the width of the depletion region is reduced to `1 mu m` during its production, then it can be used as a Zener diode for voltage regulation of

Options

A. 5 V
B. 10 V
C. `7.5` V
D. `2000` V

Answer

A

Explanation

Break down voltage is proportional to width of depletion region .
When width reduce to 1 Nm thus becomes `(1)/(20)` times then break down voltage also becomes `(1)/(20)` times thus it become 5V
So, Zener diode can used for voltage regulation of 5 V