Calculator and formulas for calculation of current and power of an RC parallel circuit
The calculator calculates current, power, impedance and reactance in the parallel circuit of a resistor and a capacitor.

The total resistance of the RC series circuit in the AC circuit is called Impedance Z. Ohm's law applies to the entire circuit.
Current and voltage are in phase at the ohmic resistance. At the capacitive reactance of the capacitor, the voltage lags the current by −90 °.
The total current I is the sum of the geometrically added partial currents. For this purpose, both partial flows form the legs of a right triangle. Its hypotenuse corresponds to the total current I. The resulting triangle is called the current triangle or vector diagram of the currents.
\(\displaystyle I=\sqrt{{ I_R }^2+{I_C}^2} \)
\(\displaystyle I\) Total current \(\displaystyle I_R\) Current through the resistor \(\displaystyle I_C\) Current through the capacitor
In parallel circuit, the partial currents behave like the conductance values of resistances.
\(\displaystyle y=\sqrt{G^2+{B_C}^2} \)
\(\displaystyle G\) Conductance [1/R] \(\displaystyle B_C\) Susceptance [1/X_{C}] \(\displaystyle Y\) Admittance [1/Z]
\(\displaystyle Z=\frac{X_C · R}{\sqrt{R^2+{X_C}^2}} \)
\(\displaystyle X_C\) Capacitive reactance \(\displaystyle R\) Effective resistance \(\displaystyle Z\) Impedance
\(\displaystyle S=\sqrt{P^2+Q^2} \)
\(\displaystyle S\) Apparent power \(\displaystyle P\) Real power \(\displaystyle Q\) Reactive power
\(\displaystyle P=U · I_R \)
\(\displaystyle P\) Real power \(\displaystyle U\) Voltage \(\displaystyle I_R\) Current through the resistor
\(\displaystyle Q=U · I_C \)
\(\displaystyle Q\) Reactive power \(\displaystyle U\) Voltage \(\displaystyle I_C\) Current through the capacitor
