The correct answer is: D. purely resistive circuit
When operating above its resonant frequency, the inductive reactance of the inductor is less than the capacitive reactance of the capacitor. This means that the total impedance of the circuit is dominated by the resistive component, and the circuit behaves like a purely resistive circuit.
A series RL circuit is a circuit that consists of a resistor, an inductor, and a voltage source connected in series. The impedance of a series RL circuit is given by the following equation:
$Z = R + j\omega L$
where $R$ is the resistance of the resistor, $\omega$ is the angular frequency of the applied voltage, and $L$ is the inductance of the inductor.
A series RC circuit is a circuit that consists of a resistor, a capacitor, and a voltage source connected in series. The impedance of a series RC circuit is given by the following equation:
$Z = R + j\omega C$
where $R$ is the resistance of the resistor, $\omega$ is the angular frequency of the applied voltage, and $C$ is the capacitance of the capacitor.
A series RLC circuit is a circuit that consists of a resistor, an inductor, and a capacitor connected in series. The impedance of a series RLC circuit is given by the following equation:
$Z = R + j\omega L – j\frac{1}{\omega C}$
where $R$ is the resistance of the resistor, $\omega$ is the angular frequency of the applied voltage, $L$ is the inductance of the inductor, and $C$ is the capacitance of the capacitor.
The resonant frequency of a series RLC circuit is the frequency at which the inductive reactance and the capacitive reactance are equal in magnitude. The resonant frequency is given by the following equation:
$\omega_r = \frac{1}{\sqrt{LC}}$
When a series RLC circuit is operated above its resonant frequency, the inductive reactance is less than the capacitive reactance. This means that the total impedance of the circuit is dominated by the resistive component, and the circuit behaves like a purely resistive circuit.