What is the main purpose of capacitors in electrical circuits?

The main purpose of capacitors in electrical circuits is to improve power factor and voltage. Capacitors are passive electronic components that store and release electrical energy in the form of an electric field. They play a crucial role in power systems by compensating for reactive power caused by inductive loads, such as motors and transformers.

When capacitors are used in conjunction with these loads, they help to balance the voltage levels in the circuit, ensuring that the system operates more efficiently. This improved power factor reduces energy losses and increases the capacity of the electrical system to carry additional loads without needing more generation capacity. Capacitors also help to smooth out voltage fluctuations, supporting the stability of the electrical supply.

In contrast, the other options describe functions that do not align with the role of capacitors. Resisting current and increasing resistance pertains to resistors, while generating current is typically associated with power sources like batteries or generators. Therefore, the correct answer clearly highlights the essential role capacitors play in enhancing the performance of electrical circuits.