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Q#1 Power Semiconductor Devices GATE EE 2007 MCQ +2 marks -0.66 marks

A 1:1 Pulse Transformer (PT) is used to trigger the SCR in the adjacent figure. The SCR is rated at 1.5 kV,250A with 250mA, 150mA, and 150mA, 100mA. The SCR is connected to an inductive load, where L = 150mH in series with a small resistance and the supply voltage is 200V dc. The forward drops of all transistors/diodes and gate-cathode junction during ON state are 1.0 V

 

The resistance R should be

4.7 kΩ

470 kΩ

47 Ω     

4.7 Ω

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