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cse • paper_1 • electrodynamicscse-2017-subject-03-006

Electrostatics and Magnetostatics — UPSC CSE 2017 Physics PYQ

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How large an inductance needs to be connected in series with a 120 V, 60 W lightbulb if it is to operate normally when the combination is connected across a 240 V, 60 Hz supply?

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