A zener diode has a contact potential of 1 V in the absence of biasing. It undergoes Zener breakdown for an electric field of `10^(6)` V/m at the depletion region of p-n junction. If the width of the depletion region is 2.5 `mu`m, what should be the reverse biased potential for the Zener breakdown to occur ?

Options

A. 3.5 V
B. 2.5 V
C. 1.5 V
D. 0.5 V

Answer

B

Explanation

Reverse biased potential for the Zener breakdown,
`V_r=Ed=10^6 xx 2.5 xx 10^(-6)` = 2.5 volt