WHAT IS A CHOKE COIL?? ITS ADVANTAGES AND APPLICATION

A choke is an inductor designed to block (have a high reactance to) a particular frequency in an electrical circuit while passing signals of much lower frequency or direct current. Common-mode choke coils are useful in a wide range of prevention of electromagnetic ... cores and low inductance as if only air surrounded the coil.

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 a choke coil is a inductor have negligible resistance high inductance

its advantage is

it is used in fluorescent tube with ac main to avoid loss due to heat by a resistor

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thanxx 

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