A component whose value is measured in microfarads is a:

A component measured in microfarads is classified as a capacitor. Capacitors are electrical components that store electrical energy in an electric field, and their capacitance is often expressed in farads, with microfarads (µF) being a common unit for smaller values.

Capacitance reflects the ability of the capacitor to store charge: one microfarad is equal to one-millionth of a farad. In practical applications, capacitors play vital roles in filtering signals, smoothing out voltage fluctuations, and coupling and decoupling signals in circuits, among other uses.

The other components mentioned have different functions and measurement units: resistors are measured in ohms, inductors in henries, and transformers typically deal with voltages and current ratios rather than capacitance directly. Thus, understanding the role of capacitance is crucial in electronics and helps identify capacitors from other circuit elements.