What is the primary purpose of a surge protector?

The primary purpose of a surge protector is to protect electrical devices from voltage spikes. Voltage spikes, which can occur due to various factors like lightning strikes, power fluctuations, or sudden changes in electrical demand, can cause significant damage to sensitive electronic equipment. A surge protector works by diverting the excess voltage away from the devices it is protecting, ensuring that the devices receive only the required voltage level. This prevention against sudden surges helps to extend the lifespan of electrical equipment and maintain operational integrity, making choice B the correct one in this context.

The other options present functions that do not align with the primary role of a surge protector. Increasing electrical load capacity refers to a different aspect of electrical systems, while converting electrical energy into mechanical energy relates to devices like motors, not surge protection. Enhancing the efficiency of power distribution involves improving how electricity is transmitted, which is unrelated to the function of surge protection.