In: Physics
Show that RC has units of seconds if R is in ? and C is in F
Consider the equation for a capacitor: q = CV or C = q/V
The standard unitsare Farad = Coulomb /Volt
And consider ohms law: V = IR or R = V/I
Standard unitsare: ohm = Volt / Amp
Now... if we multiply together RC we get units of ohm *Farad which are
(Volt / Amp) * (Coulomb /Volt) we can cancel"Volt" and we have
Coulomb /Amp But an Amp is a coulomb / second so
Coulomb / (Coulomb / sec) is sec DONE!