Capacitor

Capacitors are used to store charge Q and this charge is usefull it acts like a battery after the power supply have been removed it is also used to smooth out voltage. Capacitance is measured in fared (1 Fared is 1,000,000, mF microfared). Capacitors takes less than a second to fully charge.

Time constant
T=5RC
(R)resistor=ohms
(C)capacitance=farad
(T)time=sec

Measure charge
C=Q/V
(C)capacitance=farad
(Q)charge=coulombs
(V)voltage=V

To measure capacitance in
Series :  1/Ct=1/C1+1/C2
Parallel : Ct=C1+C2