About This Chapter
Who's it for?
This unit of our AP Physics 1 Homeschool course will benefit any student who is trying to learn about direct current circuits. There is no faster or easier way to learn about this type of electric circuit. Among those who would benefit are:
- Students who require an efficient, self-paced course of study to learn about electric current and resistance, the components of parallel and series circuits, Kirchhoff's rules, Ohm's law and calculations involving power and equivalent resistance.
- Homeschool parents looking to spend less time preparing lessons and more time teaching.
- Homeschool parents who need a physics curriculum that appeals to multiple learning types (visual or auditory).
- Gifted students and students with learning differences.
How it works:
- Students watch a short, fun video lesson that covers a specific unit topic.
- Students and parents can refer to the video transcripts to reinforce learning.
- Short quizzes and a direct current circuit unit exam confirm understanding or identify any topics that require review.
Direct Current Circuit Unit Objectives
- Explain the difference between direct and alternating current
- Name the units used to measure current and resistance
- List factors affecting electrical resistance
- Understand the applications of Ohm's law
- Solve equations for energy and power
- Identify an electric circuit's components
- Differentiate between series and parallel circuits
- Calculate equivalent resistance
- Apply Kirchhoff's rules
1. What is Electric Current? - Definition, Unit & Types
Like a river current is the flow of water molecules, electrical current is the flow of charged particles. In this lesson, we're going to explore what electrical current is, what causes it, and that, unlike a water current, electrical current doesn't always flow in one direction.
2. Electrical Resistance: Definition, Unit & Variables
We'll take a shopping trip to the mall to learn how electrical resistance works and how it is affected by resistivity, conductor dimensions, and temperature. We'll also take a look at several common appliances that take advantage of resistance to function.
3. Ohm's Law: Definition & Relationship Between Voltage, Current & Resistance
Did you know that electrical current is affected by the voltage and resistance in a circuit? In this lesson, we'll use Ohm's law, which tells us how current, voltage, and resistance are related, as we work through several electric circuit examples.
4. Calculating Energy & Power in Electric Circuits
In this video lesson, you will learn how to find the power in an electric circuit using either the voltage or the resistance in the circuit. See how this power translates into the energy we see at work in light bulbs and other electrical products.
5. Electric Circuit Fundamentals: Components & Types
Electric circuits can be configured to power several loads, such as light bulbs, in series or in parallel. In this lesson, we'll look at both types of circuits and see how the voltage, current, and resistance are affected by installing additional loads.
6. Series Circuits: Definition & Concepts
When you flip a switch to turn your lights on, you are completing a circuit and providing a pathway for electrons to flow. In this lesson, you'll learn how connecting devices in a series along that circuit affects the current and resistance throughout.
7. Parallel Circuits: Definition & Concepts
People moving through an airport are similar to electrons moving through a circuit. Parallel circuits are one type of simple circuit, and they get their name from the multiple, parallel paths they provide for electron flow.
8. Finding the Equivalent Resistance: Series, Parallel & Combination Circuits
How does resistance impact the way that electrical currents flow through a circuit That's what we are exploring in this lesson. We'll check out resistance in the three main kinds of circuits and practice calculating this value.
9. Applying Kirchhoff's Rules: Examples & Problems
Ohm's Law can be useful for analyzing simple circuits, but when circuits are more complex, as they often are, we can instead analyze the circuits using Kirchhoff's rules. Learn about Kirchhoff's rules in this lesson.
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Other chapters within the AP Physics 1: Homeschool Curriculum course
- AP Physics 1 Vectors: Homeschool Curriculum
- AP Physics 1 Kinematics: Homeschool Curriculum
- AP Physics 1 Newton's Laws: Homeschool Curriculum
- AP Physics 1 Work, Energy, & Power: Homeschool Curriculum
- AP Physics 1 Linear Momentum: Homeschool Curriculum
- AP Physics 1 Motion: Homeschool Curriculum
- AP Physics 1 Oscillations: Homeschool Curriculum
- AP Physics 1 Rotational Motion: Homeschool Curriculum
- AP Physics 1 Electrical Forces and Fields: Homeschool Curriculum
- AP Physics 1 Mechanical Waves: Homeschool Curriculum