In a zener regulated power supply, a zener diode with `V_(Z)=5.0V` is used for regurlation. The load current is to be 2.0 mA and the unregulated input is 10.0V. What should be the value of series resistance `R_(S)`?

Explanation

To find the value of the series resistance \( R_S \) in a Zener regulated power supply, we can follow these steps:

### Step 1: Understand the Circuit
We have a Zener diode with a Zener voltage \( V_Z = 5.0V \) connected in reverse bias across the load. The unregulated input voltage is \( V_{in} = 10.0V \), and the load current \( I_L = 2.0mA \).

### Step 2: Calculate the Zener Current
The Zener diode will maintain a constant voltage of \( V_Z \) across the load. The total current \( I \) flowing through the series resistor \( R_S \) is the sum of the load current \( I_L \) and the Zener current \( I_Z \).

...