The change in current through a junction diode is 12mA when the forward bias voltage is changed by 0.6 V. The dynamic resistance is

Options

A. `500 Omega`
B. `300 Omega`
C. `150 Omega`
D. `250 Omega`

Answer

a

Explanation

Change in current through junction diode,
`Delta I = 1.2 mA = 1.2 xx 10^(-3) A`
Change in forward bias voltage `Delta V = 0.6 V`
Dynamic resistance,
`R_(dyn = (Delta V)/(Delta I) = (0.6)/(1.2 xx 10^(-3)) = 500 Omega`