*Question G5A07:
What is the term for the inverse of impedance?*  

*Correct Answer is  D: Admittance*  

### AI Response: (may contain errors)  

In electrical engineering, impedance ($Z$) is a measure of how much a circuit resists the flow of alternating current (AC). The inverse of impedance is called **admittance** ($Y$).

1. **Correct Answer: Admittance**
   - Admittance is the reciprocal of impedance. It measures how easily a circuit allows the flow of AC. The relationship is given by:
     $$Y = \frac{1}{Z}$$
   - Admittance is expressed in siemens (S).

2. **Why the Other Choices are Incorrect:**
   - **Conductance (A):** Conductance is the inverse of resistance, not impedance. It is a measure of how easily direct current (DC) flows through a conductor. The formula is:
     $$G = \frac{1}{R}$$
     where $R$ is resistance.
   - **Susceptance (B):** Susceptance is the imaginary part of admittance, related to the reactive component of impedance. It is not the inverse of impedance itself.
   - **Reluctance (C):** Reluctance is a concept from magnetism, not electrical circuits. It measures the opposition to magnetic flux, similar to resistance in electrical circuits.

In summary, admittance is the correct term for the inverse of impedance, while the other options relate to different concepts in electrical and magnetic systems.