Q9. A Zener diode circuit is shown in figure below. Given V₂ = 10 V, (a) Determine Iz, VL, IL and IR assuming that V, 35 V, R, 1 k2 and R₁ = 500 2. (b) Determine the range of RL, so that the Zener will maintain in the 'ON' state when Izmax 15 mA (c) Calculate the diode's maximum power dissipation, Pzimax) (Ans: (a) V-10V, 1-20mA, I-25mA, 1-5mA, (b) 4000<R<lk (c) P-150mW) R₁ IR -O VL Iz IL Vz Q10. Please refer to the circuit in figure below: (a) Determine the range of input voltage Vin that will maintain the Zener diode in the figure below to be in regulation. Assume Izmin =0A. (Ans: 23.67<Vs<36.87V) (b) Plot V₁ versus Via and highlight the range of Vin when Zener is in regulation. www 2200 Vz=20V IZM-60 mA RL 1.2 k www Q11. A loaded zener regulator circuit is shown in figure below: (a) Determine VL, IL, Iz, and Is if RL 120 2. (Ans: V-7.5V, Is-I-62.5mA, Iz-04) (b) Repeat part (i) if RL-270 2. (Ans: VL-9.1V, Is-54.5mA. IL-33.70mA. Iz-20.8mA) (c) Determine the minimum value of R₁ to ensure the Zener diode is in the 'ON' state. (Ans: RL(min-166.9792) Rs 20V ww 20012 Vz 9.1V RL