Component units – A capacitor’s value is expressed in what unit?

Introduction / Context:
Datasheets and schematics routinely specify capacitor values. Interpreting these correctly is critical for repairs, substitutions, and design changes in analog, digital, and RF circuits.

Given Data / Assumptions:

• We seek the unit used to specify a capacitor’s capacitance value.
• Standard SI unit conventions apply.
• No special measurement context (e.g., ESR) is implied.

Concept / Approach:

The capacitance of a capacitor is measured in farads (F). Because 1 F is large, most components are labeled in microfarads (µF), nanofarads (nF), or picofarads (pF). Voltage printed on the capacitor is a rating, not the stored value.

Step-by-Step Solution:

Verification / Alternative check:

Cross-check with formulae: Q = C * V and reactance Xc = 1/(2πfC), where C is in farads. Lab LCR meters read out in F, µF, nF, or pF.

Why Other Options Are Wrong:

Volts are a voltage rating; ohms measure resistance; “resistance” is not a unit and does not describe capacitance; “None of the above” is incorrect given farads is listed.

Common Pitfalls:

Confusing microfarads with millifarads; mixing nF and pF; overlooking polarity in electrolytics which is separate from capacitance magnitude.

Final Answer:

Farads (F).