MCQOPTIONS
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				| 1. | 
                                    The rise time (tr) is the time it takes for a pulse to rise from its                point up to its point. The fall time (tf) is the length of time it takes to fall from the to the point. | 
                            
| A. | 10%, 90%, 90%, 10% | 
| B. | 90%, 10%, 10%, 90% | 
| C. | 20%, 80%, 80%, 20% | 
| D. | 10%, 70.7%, 70.7%, 10% | 
| Answer» B. 90%, 10%, 10%, 90% | |