Q$5$

For below circuit, given that

Supply voltage $(V_S)$ is $220$ V

Resistor $(R_S)$ is $20$

Forward bias voltage of diode $(V_F)$ is $0\mathrm{.}65$ V

Bulk resistance of diode $(R_B)$ is $0\mathrm{.}5$

Determine the current pass through the diode by

a$)1^{st}$ approximation.

b$)2^{nd}$ approximation.

c$)3^{rd}$ approximation.

d$)$ Hence, which approximation is preferable in order to have precisely current flow?