In our country the frequency of AC produced for transmission is 50Hz.
a)What does it mean by frequency of an AC?
b)In one second , how many times the direction of emf change?
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Answer:
a)Alternating current (ac) frequency is the number of cycles per second in an ac sine wave.
b)The frequency of AC in India is 50 Hz and in each cycle it alters direction twice. Therefore AC changes direction 2×50=100 times in one second.
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