Question

The knee voltage of a p-n junction diode is 0.8 V and the with of the depletion layer is 2 $\mu m$, the electric field in the depletion layer is

• A. 4 MV/m
• B. 0.4 MV/m
• C. 4 kV/m
• D. 0.4 kV/m

Answer 1

Answer: (B)

0.4 MV/m

Answer 2

$E=\frac{\Delta V}{\Delta r}=\frac{0.8}{2 \times 10^{-6}}$ $=0.4 \,MV / m$