Ohm's Law
V = IR
V = Voltage (volt)
I = Current (amps)
R = Resistance (ohms)
V = Voltage (volt)
I = Current (amps)
R = Resistance (ohms)
Current
I = e
R + r
e = emf (volts)
(the amount of chemical energy converted to electrical energy, per unit charge)
R = resistor (ohms)
r = internal resistance (ohms)
R + r
e = emf (volts)
(the amount of chemical energy converted to electrical energy, per unit charge)
R = resistor (ohms)
r = internal resistance (ohms)
Power
P = VI
V - potential difference (volt)
I - current (amp)
V - potential difference (volt)
I - current (amp)
P = I²R
I - current (amp)
R - resistance (ohm)
I - current (amp)
R - resistance (ohm)
P = V²/R
V - potential difference (volt)
R - resistance (ohm)
V - potential difference (volt)
R - resistance (ohm)
Resistors in Series
Total Resistance
R1 + R2 = R
R1 - resistance of first resistor (ohm)
R2 - resistance of second resistor (ohm)
R1 - resistance of first resistor (ohm)
R2 - resistance of second resistor (ohm)
"Series and Parallel Circuits." BBC News. BBC. Web. 03 Feb. 2014.