About This Chapter
Electricity & Magnetism Fundamentals - Chapter Summary
If you haven't studied electricity and magnetism in weeks, months or even years, this chapter can quickly get you up to speed. Explore informative lessons offering comprehensive overviews of topics like electrical resistance, Ohm's law, electric motors and generators and more. After studying the lessons, you will be ready to do the following:
- Share examples of electric and magnetic phenomena
- Discuss ways to predict charges and poles through observation
- Explain how magnetic fields are created
- Outline the role of magnetic force in technological devices
- Describe how energy is stored and charged in electric and magnetic fields
- Differentiate between parallel and series circuits
- Compare and contrast electric power and electric current
- Provide examples of energy transfers in circuits
You may study these lessons at home or in any location that offers an Internet connection using your computer, smartphone or tablet. This flexibility ensures you're able to brush up on your knowledge of electricity and magnetism when most convenient. Our quizzes and exam can effectively check your understanding of this chapter. If you'd like to track your progress or revisit specific portions of this chapter, be sure to visit our Dashboard.
1. How Magnetic Fields Are Created
Have you ever wondered how magnetic fields are created? In this lesson, we'll discuss the very simple answer to this question and look at how electric current can be used to make electromagnets, which have many everyday applications.
2. The Role of Magnetic Force in Technological Devices
After completing this lesson, you will be able to explain what magnetic forces are, and describe various technological devices that use magnets. A short quiz will follow.
3. Electric Motors & Generators: Converting Between Electrical and Mechanical Energy
Both generators and electric motors are common devices in everyday life, but how do they work and what is the difference between them? In this lesson, we'll explore both of them, which may produce different results but are actually more similar than they may seem.
4. 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.
5. 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.
6. What is Electric Power?
Power is a word we use all the time, but do you really know what it means? We'll look at how electrical power relates to voltage, current and resistance and how knowing that relationship can help you in everyday life.
7. 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.
8. 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.
9. 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.
10. Energy Transfers in Circuits: Equations & Examples
In a circuit, energy is always being transformed from electrical energy into other forms, like light and thermal energy. In this lesson, learn how energy is transformed and how to calculate exactly how much energy is transformed in a circuit.
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