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In a digital measuring device the input electrical signal is in the frequency range of dc to ac (50) Hz. It must be sampled at a rate of | |
A. | f times/sec [Wrong Answer] |
B. | 0.5 f times/sec [Wrong Answer] |
C. | 0.25 f times/sec [Wrong Answer] |
D. | 2 f times/sec [Correct Answer] |