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Choke Coil...

Choke Coil

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An inductor used controlling current in an AC circuit.
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[" Which of the following "],[" statements are correct in "],[" the case of choke coil? "],[" A) Choke coil works on the "],[" principle of wattless current "],[" B) A choke coil has high "],[" inductance and low "],[" resistance "],[" C) A choke coil is preferred "],[" to a rheostat in ac circuit as "],[" it consumes almost zero "],[" power "],[" D) Choke coil is used to "],[" control both ac and de "]

The coil of choke in a circuit

The purpose of choke in a fluorescent lamp is ,

A 50 V-10 W electric lamp is connected across an AC source of 100 V - 50 Hz. (i) Find the inductance of the choke required . (ii) If a resistoer is used in place of the choke coil to obtain the same result find its value.

An iron choke and an electric bulb are connected in series with AC mains. On introducing a soft iron bar in the coil, the intensity of bulb will