Capacitance opposes a change in which electrical property?

Capacitance is fundamentally linked to voltage in an electrical circuit. Specifically, a capacitor stores electrical energy in the form of an electric field created by the separation of charges. When there is a change in voltage, the capacitor will either charge or discharge, which directly affects the current flowing through the circuit. This behavior shows that capacitance acts to resist changes in voltage.

When the voltage across a capacitor changes, the capacitor either absorbs energy (increasing its charge) or releases energy (decreasing its charge). The ability of the capacitor to store or release this energy means that it specifically plays a role in managing voltage levels, making it accurate to say that capacitance opposes changes in voltage.

In contrast, current, resistance, and power are related to different aspects of electrical behavior, where current is the flow of electric charge, resistance is the opposition to that flow, and power is the rate at which energy is transferred. While capacitance can influence current (as the voltage changes induce current flow in the circuit), it does not directly oppose current itself but rather the change in voltage that impacts current.