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What Are Inductors, Coils, and Chokes?

An inductor is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it. It is typically made of a coil of wire wound around a core.

What are Coils?

A coil is a fundamental component of an inductor. It is a wound configuration of one or more turns of an electrical conductor, such as a wire.

What are Chokes?

A choke is a type of inductor specifically designed to oppose changes in current. They are often used to filter out high-frequency noise from power supplies and electronic circuits.

Key Functions of Inductors, Coils, and Chokes

Energy storage: Inductors store energy in a magnetic field.

Filtering: Chokes can filter out high-frequency noise from power supplies.

Tuning: Inductors are used in tuning circuits for radio receivers and oscillators.

Coupling: Inductors can be used to couple energy between different circuits.

Current limiting: Inductors can limit the rate of change of current in a circuit.

Applications of Inductors, Coils, and Chokes

Power supplies: Chokes are used in power supplies to filter out high-frequency noise and stabilize the output voltage.

Radio frequency circuits: Inductors are used in radio frequency circuits for tuning, filtering, and matching.

Motors: Inductors are used in motors to create magnetic fields that interact with the rotor to produce torque.

Transformers: Transformers use multiple coils to transfer electrical energy from one circuit to another.

Sensors: Inductors can be used in sensors to measure various physical quantities such as position, speed, and flow rate.