For 2 capacitors in series what is the phase difference between supply Vac and V across 1 capacitor?
Answer:
The two caps act as voltage dividers, the same as two resistors. If one cap is larger in value, it will have less voltage across it. The phase across both caps is the same as the input phase. There is nothing to change phase in the circuit (no Ls or Rs). The phase between the current and voltage is 90 degrees.
Impedence for 1 cap is -jXc, 2 cap is -2jXc, voltage ratio across 1 of the cap is -jXc/(-2jXc)=1/2 if cap's value is the same.
So u can see there is no phase difference between the voltage of 1 cap and the main supply for pure ideal cap and supply.
However the current is j or 90 degree out of phase.
There is no phase difference between the supply voltage and the voltage across the one capacitor. Because there is no resistor that will delay the charging of capacitor voltage.
there will be no phase difference between the voltages but the current in the circuit will lead the voltage by 90 degrees
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