A silicon PN junction diode under revers bias has depletion width of 10 m, relative permittivity is 11.7 and permittivity, 0 =8.85 10-12F/m. Then depletion capacitance /m2 =?

A silicon PN junction diode under revers bias has depletion width of 1

1.	A silicon PN junction diode under revers bias has depletion width of 10 m, relative permittivity is 11.7 and permittivity, 0 =8.85 10^-12F/m. Then depletion capacitance /m² =?
A.	0.1 F/m<sup>2</sup>
B.	1.7 F/m<sup>2</sup>
C.	10 F/m<sup>2</sup>
D.	0.5 F/m<sup>2</sup>
Answer» D. 0.5 F/m<sup>2</sup>