Electric Charge
Mia Gonzalez
3 min read
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Study Guide Overview
This study guide covers the fundamentals of electric charge in AP Physics 2, including the definition of charge, positive and negative charges, Coulombs (C) and elementary charges (e) as units of charge, and the Law of Electrostatics ('likes repel, opposites attract'). It also details the charges of protons, electrons, and neutrons.
#AP Physics 2: Electric Charge - Your Ultimate Study Guide ⚡
Hey there, future physicist! Let's dive into the world of electric charge. This guide will help you nail those AP Physics 2 questions, especially the ones that combine different concepts. Let's get started!
#Electric Charge: The Basics
#What is Charge?
Charge is a fundamental property of matter, like mass. It comes in two flavors:
- Positive (+): Carried by protons.
- Negative (-): Carried by electrons.
Neutrons have no charge (neutral).
Remember: Charge is measured in Coulombs (C) for large amounts, and elementary charges (e) for small amounts. One proton has a charge of +1e, and one electron has -1e. 1e = 1.6 x 10^-19 C
#Common Charges
| Particle/Object | Charge (Coulombs) | Charge (Elementary Charges) |
|---|---|---|
| Proton | +1.6x10^-19 C | +1 e |
| Electron | -1.6x10^-19 C | -1 e |
| Neutron | 0 | 0 |
Protons are Positive. Electrons are Evil (Negative). Neutrons are Neutral. (Think P-P, E-N, N-N)
#
Law of Electrostatics
"Likes repel, opposites attract." This is the golden rule of electric charge.
- Like charges (++, --) push away from each other.
- Opposite charges (+, -) pull towards each other.
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