AP Physics 2 / Unit 11: Electric Circuits
11.1 Electric Current
Notes
$$I=\frac{\Delta q}{\Delta t}$$
- Unit: ampere (C/s). Conventional current is the direction positive charge would move (opposite to electron flow).
Practice
6 C passes a point in 3 s. Current:
$\displaystyle \frac{6}{3}$.
Conventional current flows:
Defined for positive charge.
In a metal wire, the charges that move are:
Free electrons.
Ready for more? Take the Unit 11 test.