Deep Dive: G5A07
The correct answer is D: Admittance. The term for the inverse of impedance is admittance. Admittance (Y) = 1/Z, where Z is impedance. For amateur radio operators, this is a fundamental circuit concept. Understanding this helps when working with impedance and admittance.
Why Other Answers Are Wrong
Option A (Conductance): Incorrect. Conductance is the inverse of resistance (1/R), not impedance. Conductance is for DC resistance, not AC impedance. Option B (Susceptance): Incorrect. Susceptance is the imaginary part of admittance, not the inverse of impedance. Susceptance is a component of admittance. Option C (Reluctance): Incorrect. Reluctance is a magnetic circuit term, not an electrical circuit term. Reluctance is for magnetic circuits, not electrical.
Exam Tip
Inverse of impedance = admittance. Think 'A'dmittance = 'A'dmittance is '1'/Z. Admittance (Y) = 1/Z, where Z is impedance. Not conductance (1/R), not susceptance (part of Y), not reluctance (magnetic) - just admittance.
Memory Aid
Inverse of impedance = admittance. Think 'A'dmittance = 'A'dmittance is '1'/Z. Admittance (Y) = 1/Z, where Z is impedance. Represents ease of current flow, opposite of impedance.
Real-World Example
An impedance of 50 ohms has an admittance of 1/50 = 0.02 siemens. Admittance is the inverse of impedance - it represents how easily current flows, while impedance represents opposition. Admittance is useful in parallel circuit calculations.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G5A
Reference: 2023-2027 Question Pool · G5 - Electrical Principles
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G5A topic.