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The points where the waveform of an A.C. cycle cross the time axi...

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Question:
The points where the waveform of an A.C. cycle cross the time axis corresponds to phase?

Option A):
0º
Option B):
π/2 and 3π/2
Option C):
0 and π
Option D):
90º
Option E):
180º

Correct Answer is Option C):
0 and π

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