 
			 
			MCQOPTIONS
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				| 1. | Input impedance of a system is 50 , for the system to be negative feedback, which of the following can be its input impedance without feedback? | 
| A. | 50 | 
| B. | 60 | 
| C. | 40 | 
| D. | 100 | 
| Answer» D. 100 | |