Term

Definition
the amount of charge Q passing through the conductor per unit time Δt.
I = Q/Δt
expressed in amperes (1A = 1C/s) 


Term
Kirchhoff's Junction Rule 

Definition
the sum of currents directed into a point equals the sum of currents directed away from that point 


Term

Definition
Around any closed circuit loop, the sum of voltage sources will alway be equal to the sum of voltage (potential) drops 


Term

Definition
V = IR
V is the voltage drop
I is the current
R is the magnitude of the resistance 


Term

Definition
the rate at which energy is dissipated by a resistor is the power of the resistor
P = IV = I^{2}R = V^{2}/R 


Term

Definition
The total resistance of the circuit can be found by adding the individual resistances together 


Term

Definition
1/R_{}_{total} = 1/R_{1} + 1/R_{2} etc 


Term

Definition
C = Q/V = ε_{0}(A/d)
If voltage V is applied across the plates of a capacitor and a charge Q collects on it then capacitance is C in farads (F).
ε is the permittivity of free space (8.85 x 10^{12} F/m), A is the overlap of the two plates of the capacitor, d is the distance apart 


Term
potential energy stored in a capacitor 

Definition


Term
capacitors in series and parallel 

Definition
the capacitance of capacitors in series is calculated like resistors in parallel and the capacitance of capacitors in parallel is calculated like resistors in series. 

