Capacitors Flashcards
0
Q
Farad
A
Unit of capacitance.
1F = 1CV^-1
1
Q
Define capacitance
A
The ratio of charge stored by a capacitor to the PD across it
2
Q
Define the time constant of a circuit
A
The time taken for the current, charge stored or PD to fall to 1/e (about 37%) when a capacitor discharges through a resistor. It is also equal to the product of capacitance and resistance
3
Q
Coulomb’s Law
A
Any two point charges exert an electrical force on each other that is proportional to the product of their charges and inversely proportional to the square of the distance between them
