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**Title: Understanding Zener Regulator Load Current**

**Question:**  
What is the maximum load current \( I_L \) that can be drawn from the Zener regulator in Fig. P3.77 if it is to maintain a regulated output? What is the minimum value of \( R_L \) that can be used and still have a regulated output voltage?

**Diagram Explanation:**

The diagram in Figure P3.77 presents a circuit featuring a Zener regulator. Key components include:

- A 30V DC supply connected in series with a 15 kΩ resistor.
- A Zener diode with specifications \( V_Z = 9V \) (Zener voltage) and \( R_Z = 0 \) (Zener impedance).
- The load resistor \( R_L \) connected in parallel with the Zener diode, where the load current \( I_L \) flows through \( R_L \).

**Objective:**

To determine the maximum load current \( I_L \) that maintains the regulation at the Zener voltage. Additionally, ascertain the minimum value of \( R_L \) that allows for this regulated voltage.

This exercise is crucial in understanding the functioning and limitations of Zener diode regulators in electrical circuits.
Transcribed Image Text:**Title: Understanding Zener Regulator Load Current** **Question:** What is the maximum load current \( I_L \) that can be drawn from the Zener regulator in Fig. P3.77 if it is to maintain a regulated output? What is the minimum value of \( R_L \) that can be used and still have a regulated output voltage? **Diagram Explanation:** The diagram in Figure P3.77 presents a circuit featuring a Zener regulator. Key components include: - A 30V DC supply connected in series with a 15 kΩ resistor. - A Zener diode with specifications \( V_Z = 9V \) (Zener voltage) and \( R_Z = 0 \) (Zener impedance). - The load resistor \( R_L \) connected in parallel with the Zener diode, where the load current \( I_L \) flows through \( R_L \). **Objective:** To determine the maximum load current \( I_L \) that maintains the regulation at the Zener voltage. Additionally, ascertain the minimum value of \( R_L \) that allows for this regulated voltage. This exercise is crucial in understanding the functioning and limitations of Zener diode regulators in electrical circuits.
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