Capacitors Flashcards
1
Q
Capacitance
A
Charge per unit p.d. across the plates.
2
Q
Farad
A
The capacitance of a capacitor which stores a charge of 1C when a voltage of 1V is across the plates.
3
Q
Capacitors in series
A
1/CT = 1/C1 + 1/C2 +…
4
Q
Capacitors in parallel
A
CT = C1 + C2 + …
5
Q
Time constant
A
=(capacitance of capacitor)x(resistance through which it is charging or discharging) The time taken for the current, charge and p.d. for a capacitor to fall to 1/e of its original value when discharging through a resistor.
