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Q#1 Transformers GATE EE 2007 MCQ +2 marks -0.66 marks

In the figure, transformer , has two secondary, all three windings having the same number of tums and with polarities as indicated. One secondary is shorted by a 10 Ω resistor R, and the other by a 15 µF capacitor.  The switch SW is opened (t = 0) when the capacitor is charged to 5V with the left plate as positive. At t=0+ the voltage and current are

25 V, 0.0 A

Very large voltage, very large current

5.0 V, 0.5 A

–5.0V, -0.5 A

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