What happens to the voltage across a load when a zener diode is used correctly?

When a zener diode is used correctly in a circuit, its primary function is to regulate voltage. A zener diode is designed to maintain a stable output voltage across its terminals, regardless of variations in the input voltage or load conditions, as long as it is operated within its specified limits.

In breakdown or reverse bias condition, the zener diode allows current to flow while keeping the voltage constant at its designated zener voltage. This characteristic makes it highly effective for voltage regulation applications, such as in power supplies or protection circuits. Thus, when it is employed correctly, the voltage across the load remains constant, providing a reliable reference voltage which is crucial for sensitive electronic components.