What is the primary function of a capacitor?

The primary function of a capacitor is to store electricity. Capacitors are electrical components that can store a charge when a voltage is applied across their terminals. When the voltage is removed, the capacitor can release this stored energy back into the circuit. This storage capability is vital in various applications, including smoothing out voltage fluctuations in power supplies, providing energy for short bursts of power in electronic devices, and filtering signals in radio frequency applications.

While other components and devices in electrical systems perform different functions, such as generating electricity, converting AC to DC, or measuring voltage, the specific role of a capacitor is distinctly centered on energy storage. This characteristic sets capacitors apart as crucial components in many electronic circuits, enabling them to operate efficiently and reliably.