Current

Current is defined the amount of Charge moving through a point per second. Conventionally, current is visualised as flowing from a point of high Electrical Potential to a lower Electrical Potential. A lot of things change when charge is moving, as we no longer treat them as static charges.

Definition §

Given a cross sectional area, the current flowing through said area is given by:

Current

$$I=\frac{q}{t}I=\frac{\text{d}q}{\text{d}t}$$

Note

• $I$ = Current (in Amperes, $A=C/s$)
• $q$ = Charge (in $C$)
• $t$ = Time period (in $s$)