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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A Choke coil is needed to operate an arc lamp at 160V (rms) and 50Hz. The lamp has an effective resistnce of 5Ω when running at 10A(rms). Calculate the inductance of the choke coil. If the same arc lamp is to be operated on 160V(DC), what additional resistance is required ? Compare the power loses in both cases.

A Choke coil is needed to operate an arc lamp at 160V (rms) and 50Hz. The lamp has an effective resistnce of 5Ω when running at 10A(rms). Calculate the inductance of the choke coil. If the same arc lamp is to be operated on 160V(DC), what additional resistance is required ? Compare the power loses in both cases.

a constant current 2.5 A flows. When the same inductor coil is connected to an ac source of 10 V and 50 Hz then the current is 2 A. Find out the indutance of the coil. When an inductor coil is connected to an ideal battery of emf 10 V