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In a thyistorised converter a free wheeling diode is used to 

A) Add to the conduction current ofthe thyristor B) Oppose the thyristor conduction C) Conduct current during the off period of the thyristor D) Protect the thyristor by providing a shunt path

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In a thyistorised converter a free wheeling diode is used to Conduct current during the off period of the thyristor

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