Which electrical component is primarily used to interrupt power in case of overload?

• A. Transformer
• B. Fuse
• C. Capacitor
• D. Diode

Answer: (B)

The fuse is the electrical component primarily used to interrupt power in case of an overload. Its fundamental purpose is to protect electrical circuits from excess current that can cause overheating or damage. When the current flowing through the fuse exceeds its rated capacity due to an overload, the fuse will melt or blow, creating an open circuit and thus stopping any further current flow. This interruption protects wiring and components downstream from damage that can occur due to excessive heat generated by an overload condition.

In contrast, a transformer is designed to change voltage levels in an electrical circuit and does not serve the function of interrupting power. A capacitor stores electrical energy for later release and also does not provide overload protection. Similarly, a diode allows current to flow in one direction only, primarily serving as a rectifier or switch, but it does not function as a protective device against overloads. Thus, the fuse is the correct answer due to its specific role in circuit protection.