Measurements and Instrumentation

Q1: 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

B 0.5 f times/sec

C 0.25 f times/sec

Df times/sec

ANS:D - 2 f times/sec

Sampling frequency must be twice the input frequency.



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