If you plug a center positive power supply into a center negative appliance, it can result in potential damage to the appliance and the power supply, depending on their design and the specific voltage and current involved. Let's break down the possible scenarios:
Polarity Protection: Some appliances and power supplies have built-in polarity protection mechanisms. In this case, if you mistakenly connect a center positive power supply to a center negative appliance, the polarity protection circuitry may prevent any damage by blocking the incorrect polarity and stopping the current flow. However, it's important to note that not all devices have this protection.
Damage to the Appliance: If the appliance doesn't have polarity protection, reversing the polarity by connecting a center positive power supply to a center negative appliance can lead to damage. The internal circuitry of the appliance may not be designed to handle the reverse polarity, which can cause components to malfunction, circuits to fail, or even damage sensitive electronic parts.
Damage to the Power Supply: Reversing the polarity can also affect the power supply itself. Depending on the design, the power supply may not be equipped to handle reverse polarity, which can potentially damage its internal components or trigger protection mechanisms that shut down the power supply to prevent further damage.
To avoid potential issues, it is crucial to ensure that the polarity of the power supply matches the requirements of the appliance. Carefully check the markings on both the power supply and the appliance to determine the correct polarity before connecting them. If you are uncertain about the polarity or compatibility, it is recommended to consult the user manuals or seek assistance from a qualified technician.