Why inductors or capacitors are used in AC circuits for controlling currents ?

Explanation

### Step-by-Step Solution

1. **Understanding the Problem**: The question asks why inductors and capacitors are used in AC circuits for controlling currents. To answer this, we need to explore the behavior of these components in AC circuits.

2. **Basic Concept of AC Circuits**: In an AC circuit, the voltage and current vary sinusoidally with time. The components in the circuit, such as resistors, inductors, and capacitors, respond differently to this alternating current.

3. **Role of Inductors**: An inductor resists changes in current. When an AC voltage is applied, the inductor creates a magnetic field that opposes the change in current. This is quantified by its inductive reactance (XL), which depends on the frequency of the AC signal and the inductance of the coil. By adding an inductor to the circuit, we can control the amount of current flowing through the circuit.

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