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Which of the following is not ac waveform?(a) sinusoidal(b) square(c) constant(d) triangular |
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Answer» The correct answer is (c) constant Explanation: AC waveforms are those which periodically changes polarity with time. Sinusoidal wave, square wave, triangular wave change their polarity at regular intervals so they are ac wavefoms. Constant wave doesnot change its polarity so it is not an ac waveform. |
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