 
			 
			MCQOPTIONS
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				| 1. | In the following circuit, the diodes D1 to D4 are used to | 
| A. | reduce the switching losses | 
| B. | send current back to the dc source when SCRs are off | 
| C. | send current back to the load when SCRs are off | 
| D. | send current back to the dc source when SCRs are conducting | 
| Answer» C. send current back to the load when SCRs are off | |