Deep Dive: T5C01
The correct answer is D: Capacitance. Capacitance describes the ability to store energy in an electric field. A capacitor stores electrical energy by accumulating charge on its plates, creating an electric field between them. When voltage is applied to a capacitor, electrons accumulate on one plate (making it negative) and are removed from the other plate (making it positive). This creates an electric field between the plates, and energy is stored in this field. The amount of energy a capacitor can store depends on its capacitance value (measured in farads) and the voltage applied. Capacitors are essential components in radio circuits for filtering, coupling, and tuning.
Why Other Answers Are Wrong
Option A: Incorrect. Inductance is the ability to store energy in a magnetic field, not an electric field. Inductors store energy in magnetic fields. Option B: Incorrect. Resistance opposes current flow and dissipates energy as heat. It doesn't store energy in an electric field. Option C: Incorrect. Tolerance is a specification for component value accuracy, not an energy storage property.
Exam Tip
Store energy in electric field = Capacitance. Remember: Capacitance is the ability to store energy in an electric field. Capacitors do this.
Memory Aid
**C**apacitance = **C**harge **E**lectric **F**ield (think 'C = CEF' = Charge Electric Field)
Real-World Example
A capacitor in your power supply stores energy in its electric field. When voltage is applied, charge accumulates on the capacitor plates, creating an electric field that stores energy. This stored energy can help smooth out voltage variations. The capacitor's capacitance value (in farads) determines how much energy it can store.
Source & Coverage
Question Pool: 2022-2026 Question Pool
Subelement: T5C
Reference: FCC Part 97.3
Key Concepts
Verified Content
Question from the official FCC Technician Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the T5C topic.