In the circuit shown below, maximum Zener diode current will be ________ mA.
Correct Answer: 9
Solution and Explanation
To find the maximum Zener diode current, we follow these steps:
Determine the total supply voltage, Vin. The maximum voltage is 120 V.
Use Ohm’s Law to find the current through the series resistor, I:
I = (Vin - VZ)/Rs
where Rs = 4 kΩ and VZ = 60 V.
Substitute the values:
I = (120 - 60)/4000 = 60/4000 = 0.015 A or 15 mA
Calculate the load current, IL:
IL = VZ/RL
where RL = 10 kΩ.
Substitute the values:
IL = 60/10000 = 0.006 A or 6 mA
Find the maximum Zener diode current, IZ:
IZ = I - IL = 15 mA - 6 mA = 9 mA
The maximum Zener diode current is 9 mA, which falls within the provided range of 9,9 mA.
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