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				| 1. | The diode in the R firing circuit | 
| A. | ensures that the gate voltage is a half wave DC pulse | 
| B. | ensures that the gate voltage is a full wave DC pulse | 
| C. | ensures that the gate voltage is a half wave AC pulse | 
| D. | ensures that the gate voltage is a full wave AC pulse | 
| Answer» C. ensures that the gate voltage is a half wave AC pulse | |