WEBVTT

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The square output of the LF generator is displayed in red on the oscilloscope

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The GBF square signal supplies a serial RC circuit

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The serial RC junction point is displayed in blue on the oscilloscope

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The delay of the blue signal with respect to the red at the end of the transition

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The voltage across the capacitor is overdue!

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I reversed the position of the resistor and the capacitor to observe U in R

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The blue voltage in R becomes alternate and represents the charge and discharge current of the capacitor

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And yes, generator or receiver reverses the direction of electric current: hence the alternative ...

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All the alternatives are not sinusoidal :-)!