Symbol: I
Unit: Ampere
- Current moves through a circuit element “through a variable.”
- Current is the rate of flow of negatively-charged particles, called electrons, through a predetermined cross-sectional area in a conductor.
- Like water flow.
- Essentially, the flow of electrons in an electric circuit leads to the establishment of current.
I(t) = dq/dt
- q: relatively charged electrons (C)
- Amp = C/sec
- Often measured in milliamps, mA
Current – Water Analogy
