Electronic – Mains voltage waveform on oscilloscope


I connected the oscilloscope probe to the mains supply but i find its waveform not excactly pure sine wave, So im wondering if there are problem in my scope or something else.

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Best Answer

The sinusoidal waveform of the mains supply is very rarely (if ever) perfect. It is affected by transmission line impedance, as well as the parasitic inductance, capacitance, and resistance of the system. Additionally the machinery used to generate the mains power is often imperfect and will lead to imperfect waveforms. The signal your scope shows appears fine to me.

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