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CSE · Paper I · Electricity & Magnetismcse-2017-subject-03-006

Electrostatics and Magnetostatics — UPSC Physics Optional CSE 2017 Paper I

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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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