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Step 1 of 3 4.017E Consider that a zener diode is used in the design of a shunt regulator. Refer to Figure 4.19 in the textbook for the arrangement of zener diode in the design of shunt regulator. The zener knee current, is 1 mA. Consider that the zener diode current is greater than five times the knee current. = = = 5 mA Draw the zener diode circuit with the known values. R I + 15 V V₂ Figure 1 Step 2 of 3 Use Ohm's law to find the unknown resistor value. R = Consider that the zener voltage, , is 5.6 V, and the maximum value of load current, is 15 mA. Therefore, 9.4 = 20x10⁻³ = 470 Ω Therefore, the unknown resistor value, R is, 470 Ω a - Step 3 of 3 The maximum power dissipation of the zener diode is, = = = 112 mW Thus, the maximum power dissipation of the zener diode, is,