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				| 1. | If i(t) = 50 cos (100πt + 10°) is the expression of a sinusoidal current, find the maximum amplitude. | 
| A. | 100 A | 
| B. | 86.6 A | 
| C. | 50 A | 
| D. | 70.7 A | 
| Answer» D. 70.7 A | |