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Which of the following is true regarding an AC signal?

A The smaller the time period, the greater the frequency.
Explaination
Frequency is the number of occurrences of an event per unit time. The relationship between the frequency and time period of an AC signal is $4677_w50_h37.png$ i.e. frequency is inversely proportional to the time period of an AC signal. The smaller the time period, the greater the frequency of the signal.
B The greater the time period, the greater the frequency.
C The time period of an AC signal is directly proportional to the square of the frequency.
D There is no relation between the frequency and time period of an AC signal.