Question

Diode Problems (Including Zener Diodes)

In circuits below with Si diodes (VD0 = 0.7 V) and VZ = 5 V for Zener diodes, A) Find v and/or i for vs = 10 V, B) Find v and/or i for vs ranging from −20 to +20 V.

Answer 1

Number 1 has already been completed. @ganeshie8

Answer 2

2a) V = 0.7V, I = 0.7/5000 = 0.00014A.

Answer 3

2b) Assume off: Vs/10 = i. Vs/2 = V

Answer 4

2b) Assume on: Vs = 5i1 + V, V = Vdo, i1 = id + i