MCQOPTIONS
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				| 1. | 
                                    In a step down chopper using pulse width modulation, Ton = 3 x 10-3 and Toff = 1 x 10-3 s. The chopping frequency is | 
                            
| A. | 333.33 | 
| B. | 250 | 
| C. | 500 | 
| D. | 1000 | 
| Answer» C. 500 | |