My Bad
Thanks DMW... I need to relearn what Xc is and how to apply it.
Wayne2056
Actually that's not true I believe [for the first diagram]
The 10M has little effect on the circuit, you see capacitors have a resistance to low frequencies, this is called reluctance rather than resistance because unlike resistance no power is dissipated in the capacitor.
The Formula shown below determines the reluctance for a capacitance.
Xc = 1/(2 * Pi * F * C)
Xc = 1/(2*Pi*50*220nF)
Xc = 14.4Kohm
This is in parallel with 10M, because 10M is so high it makes little difference to the resistance.
14.4K + 1K because its in series with the 1K resistor is
15.4K
current = 230 / 15.4 = 15mA
Seems a little low to me.
Edit:Whops I was using RMS value
root(2) * 230 = 425V
425 / 15400 = 21mA.
Thats better![]()
Thanks DMW... I need to relearn what Xc is and how to apply it.
Wayne2056