The reciprocal of impedance is called

Options

A. reactance
B. admittance
C. inductance
D. conductance

Answer

To solve the question, "The reciprocal of impedance is called," we can follow these steps:

### Step 1: Understand the Concept of Impedance
Impedance (Z) is a measure of how much a circuit resists the flow of alternating current (AC). It is a complex quantity that combines resistance (R) and reactance (X).

### Step 2: Recall the Definition of Impedance
Impedance is defined mathematically as:
\[ Z = \sqrt{R^2 + (X_C - X_L)^2} \]
where:
- R is the resistance,
- \( X_C \) is the capacitive reactance,
- \( X_L \) is the inductive reactance.

### Step 3: Identify the Reciprocal of Impedance
The reciprocal of impedance (Z) is given by:
\[ \frac{1}{Z} \]

### Step 4: Define the Reciprocal of Impedance
The reciprocal of impedance is known as **admittance** (Y). Therefore:
\[ Y = \frac{1}{Z} \]

### Step 5: Conclusion
From the definitions and relationships established, we can conclude that the reciprocal of impedance is called **admittance**.

### Final Answer
The reciprocal of impedance is called **admittance**.

---