MCQOPTIONS
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				| 1. | 
                                    In a backward wave oscillator the efficiency | 
                            
| A. | is much higher than in TWT | 
| B. | is much lower than in TWT | 
| C. | is almost the same as in TWT | 
| D. | either (a) or (b) | 
| Answer» D. either (a) or (b) | |