Why is choke coil used

This helps to increase its inductive property. Radio Frequency Choke coils are those block the radio frequency signals and allow the other signals such as audio frequency signals, normal power frequency signals, and DC signals.

Radio Frequency Choke coils are made up of a coil wound on a core of iron powder or ferrite materials. Generally, radiofrequency choke coils are designed for ultra-high frequency applications. Choke coil is used with fluorescent tube light to produce a high voltage at the starting time. Choke coils are also used in power supply circuits such as voltage regulators, rectifier circuits, inverter circuits, etc.

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The low electrical resistance allows DC and AC to pass with little power loss but it can limit the amount of AC passing through it due to its reactance. However, in practice, a choke coil of inductance L possesses a small resistance r. Hence it may be treated as a series combination of an inductor and small resistance r. In that case, the average power consumed by the choke coil over a complete cycle is.

From equation 1 the value of average power dissipated works out to be much smaller than the power loss I2R in a resistance R. Chokes used in low-frequency a. Circuits have an iron core so that the inductance may be high. Here, we are given a LCR circuit. The resistance of the circuit is negligible. Is it conserved during LC oscillations? Chapter Chosen Alternating Current. Book Chosen Physics Part I.

Subject Chosen Physics. Book Store Download books and chapters from book store.