Q2. A 7.2 V zener is used in the circuit shown in Figure below and the load current is to vary from 12 to 100 mA. Find the value of series resistance R to maintain a voltage of 7.2 V across the load....

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Extracted text: Q2. A 7.2 V zener is used in the circuit shown in Figure below and the load current is to vary from 12 to 100 mA. Find the value of series resistance R to maintain a voltage of 7.2 V across the load. The input voltage is constant at 12V and the minimum zener current is 10 mA. E = 12 V