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A Choke coil is needed to operate an arc...

A Choke coil is needed to operate an arc lamp at `160 V` ("rms") and `50 Hz`. The lamp has an effective resistnce of `5 Omega` when running at 1`0 A("rms")`. Calculate the inductance of the choke coil. If the same arc lamp is to be operated on `160 V (DC)`, what additional resistance is required ? Compare the power loses in both cases.

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