The series `RLC` circuit in resonance is called:

Options

A. selector circuit
B. rejector circuit
C. amplifier circuit
D. oscillator circuit

Explanation

To solve the question regarding the series RLC circuit in resonance, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Resonance in RLC Circuits**:
- In a series RLC circuit, resonance occurs when the inductive reactance (XL) equals the capacitive reactance (XC). This condition allows the circuit to resonate at a specific frequency.

2. **Resonant Frequency Formula**:
...