What can a voltage regulator increase or decrease the voltage by?

A voltage regulator is designed to maintain a constant output voltage level despite variations in input voltage or load conditions. In many applications, voltage regulators typically have a set voltage adjustment range to ensure that they deliver stable power.

Option B, which indicates a 10% change in voltage, is often a common specification for many voltage regulators. This adjustment percentage allows for sufficient regulation while maintaining efficiency and stability within the operating range of various electrical components.

Understanding that voltage regulators can adjust voltage levels is essential in applications like power distribution in the electrical grid, where it's important to ensure that the voltage remains within acceptable limits for safe and efficient operation of electrical devices. In practical terms, this 10% adjustability is often enough to compensate for the fluctuations that may occur in the grid without risking damage to sensitive equipment connected to the system.