Choke in a circuit

A choke is an inductor that is used to block high-frequency alternating current (AC) in an electrical circuit while allowing low-frequency or direct current (DC) to pass through. It is also known as an inductor or reactor.

Function of Choke

The primary function of a choke is to smooth out fluctuations in current or voltage in a circuit. This is done by reducing the rate at which the current or voltage changes. It is especially useful in circuits that use AC power, as these circuits tend to generate a lot of high-frequency noise.

Effect on Current

The coil of choke in a circuit decreases the current. This is because the choke has a high impedance at high frequencies, which means that it blocks the flow of AC current. This results in a reduction in the amplitude of the AC signal. At low frequencies or DC, the choke has a low impedance, which allows the current to flow through it unimpeded.

Uses of Choke

Chokes are used in a variety of applications, including:

- Power supplies: Chokes are used to filter out high-frequency noise in power supplies. This helps to ensure that the output voltage is stable and free of fluctuations.
- Audio equipment: Chokes are used in audio equipment to filter out noise and to improve the quality of the sound.
- Lighting: Chokes are used in fluorescent lighting to regulate the current that flows through the lamp. This helps to ensure that the lamp operates efficiently and that it has a long lifespan.

Conclusion

In conclusion, the coil of choke in a circuit decreases the current. It is an important component in many electrical circuits and is used to filter out noise and to smooth out fluctuations in current or voltage.

In a circuit of a.c source, choke coil which is essentially an inductor with high reactance, is used to decrease the current without loss of energy. No heat is generated so no loss of energy. When we use resistance to reduce current, there is loss of electrical energy in the form of heat generated.