Depletion Width

Ask

In an abrupt pn-junction the doping concentrations on the p-side and n-side are $N_a=9 \times 10^{16}$ per $ cm^3 $ and $N_d=1 \times 10^{16} $ per $ cm^3 $ respectively. The pn-junction is reverse biased and the total depletion width is 3 um. The depletion width on p-side is
(a) 2.7 um
(b) 0.3 um
(c) 2.25 um
(d) 0.75 um


Answer is ( )

Concept

Type Reasoning here