| Ohm's Law for DC Circuits | |
Current: |
I = E/R = P/E |
Voltage: |
E = I*R = P/I |
Resistance: |
R = E/I = P/(I*I) = (E*E)/P |
Power: |
P = (I*I)*R = E*I = (E*E)/R |
| Resistors in Series and Parallel | |
Series: |
R = R1 + R2 + R3 + . . . |
Parallel: |
R = 1/( 1/R1 + 1/R2 + 1/R3 + . . .) |
| Conductors in Series and Parallel | |
Series: |
G = 1/( 1/G1 + 1/G2 + 1/G3 + . . . ) |
Parallel: |
G = G1 + G2 + G3 + . . . |
| Resistors and Conductors | |
Resistance: |
R = 1/G |
Conductance: |
G = 1/R |
