Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Current refers to the flow of electrical charge in a circuit. It is measured in amperes (A) and represents how many electrons pass through a specific point per second.
Voltage, also known as electromotive force (EMF), is the driving force behind electron flow in a circuit.
Resistance: Resistance is any factor that opposes or restricts the flow of current in a circuit. It can be compared to obstacles that slow down water flow in pipes.
Ohm's Law: Ohm's Law states that there is a direct relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = I * R.