Electric Current
Noah Martinez
5 min read
Listen to this study note
Study Guide Overview
This study guide covers electric current, focusing on the flow of charge. It explains current (I), its units (Amperes), and the driving force (voltage). It distinguishes between conventional current and electron flow. Finally, it discusses calculating current and common exam pitfalls.
#AP Physics 2: Electric Current - The Night Before ⚡
Hey! Let's make sure you're totally ready for the exam. This is your super-condensed, high-impact guide to electric current. We'll make it engaging, visual, and super clear. Let's get started!
#Electric Current: The Flow of Charge
#Basics of Current
Electric current is all about the flow of electric charge, typically through a wire or other conductive material. Think of it like water flowing through a pipe, but instead of water, it's electric charges!
-
Current (I): Measures the amount of charge (Q) passing through a cross-sectional area of a wire per unit time (t). It's like counting how many 'charge particles' flow past a point each second.
-
Units: Amperes (A), where 1 Ampere = 1 Coulomb per second (C/s).
-
Driving Force: Electric potential difference (voltage or emf, ε) pushes charges through the circuit, much like pressure pushes water through a pipe.
#Direction of Current
It's crucial to remember that conventional current direction is defined as the direction positive charg...
How are we doing?
Give us your feedback and let us know how we can improve