Constant voltage power supplies will maintain a constant voltage under varying __________.

• A. loads
• B. currents
• C. temperatures
• D. frequencies

Answer: (A)

Voltage regulation is about keeping the output voltage steady as the connected load changes. A constant voltage power supply does this by continuously adjusting how much current it delivers to the output so the voltage stays at the set value. When more devices are connected and draw more current, the regulator increases current to keep the voltage from dropping. When fewer devices draw current, it reduces current to prevent the voltage from rising. Temperature or frequency shifts can cause some drift, but the defining feature is maintaining the voltage despite changes in the load.