An electric bulb is designed to consume ...

An electric bulb is designed to consume `55 W` when operated at `110` volts.It is connected to a `220 V,50 Hz` line through a choke coil in series.What should be the inductance of the coil for which the bulb gets correct voltage?

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The correct Answer is:

`(2.2sqrt3)/(pi)=1.2H=(7sqrt3)/(10)H`

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