Battery | Resistor | Series | Parallel | |
Ohm's Law: | V = IR | current same | voltage same | |
V=Voltage | (Volts) | V = V_{1} + V_{2} | I = I_{1} + I_{2} | |
I=Current | (Amperes) | V = IR_{1} + IR_{2} | I = V/R_{1} + V/R_{2} | |
R=Resistance | (Ohms) | R = R_{1} + R_{2} | 1/R = 1/R_{1} + 1/R_{2} |