Frequency
If the loop is rotated at the speed of 2 revolutions each second, the resultant EMF will complete 2 cycles each second. The number of cycles each second is referred to as frequency.
The symbol for frequency is ( f ). It is measured in cycles per second ( CPS ) or more commonly Hertz ( Hz ). The time in which one cycle is completed is known as the periodic time. A frequency of 50 Hz is the standard for the supply system in Ireland.
The frequency of a supply can be calculated as follows:
Example 1
An alternating voltage waveform has a periodic time of 4 mS. Calculate the frequency of the supply?
Solution
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