Compare different methods of frequency and phase measurements by
taking some suitable values.
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Explanation:
An important electrical quantity with no equivalent in DC circuits is frequency.
Frequency measurement is very important in many applications of alternating current, especially in AC power systems designed to run efficiently at one frequency and one frequency only.
If the AC is being generated by an electromechanical alternator, the frequency will be directly proportional to the shaft speed of the machine, and frequency could be measured simply by measuring the speed of the shaft.
If frequency needs to be measured at some distance from the alternator, though, other means of measurement will be necessary
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