2.19 Consider the circuit shown in Figure P2.19. The Zener diode voltage is

Vz = 3.9 V and the Zener diode incremental resistance is r₂ = 0. (a) Deter-

mine Iz, IL, and the power dissipated in the diode. (b) Repeat part (a) if the

4 k2 load resistor is increased to 10 ks2.

20 V2

12 ΚΩ

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Figure P2.19

14₂ 1½

VzZ

40 V

120 2

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Figure P2.20

V₂

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