Charge
Charge (Coulombs) = Current (Amperes) x Time (Seconds)
Voltage
Voltage (Volts) = Current (Amperes) x Resistance (ohms)
Energy
Energy (joules) = Power (watts) x Time (seconds)
Power
Power (watts) = Current (amperes) x Voltage (volts)
Turns-Ratio
Ns/Np = Vs/Vp
Velocity
V = F x Lambda (wavelength)