About This Chapter
Electromagnetic Induction & Alternating Currents - Chapter Summary
In this chapter, our expert instructors delve into the basics of electromagnetic induction and currents. Short lessons help you better understand eddy currents, Faraday's law of electromagnetic induction, alternating currents and more. Once you've completed this chapter, you will be ready to:
- Discuss the application of Faraday's law of electromagnetic induction
- Share details about Lenz's law, magnetic flux and motional EMF
- Define and discuss the application of an eddy current
- List the advantages and disadvantages of an alternating current
- Provide details about impedance in alternating current circuits
- Exhibit an understanding of R-L-C series circuits
- Describe how electric motors and generators convert between electrical and mechanical energy
- Explain the basics of electromagnetic induction
Around-the-clock access to the lessons helps you study electromagnetic induction and current concepts whenever you have free time. Mobile features ensure you're able to review the lessons, take multiple-choice quizzes and access other chapter resources via any smartphone or tablet. Use the Dashboard to track your progress through this chapter and send any questions you have about lesson topics to our experts. Answer questions on the practice exam to get a comprehensive review of the lessons.
1. Faraday's Law of Electromagnetic Induction: Equation and Application
Electromagnetic induction allows us to induce voltage with the movement of a magnetic field. Credited to Michael Faraday, this discovery was not only groundbreaking at the time, but it has since led to many applications in everyday life.
2. Lenz's Law, Magnetic Flux and Motional EMF
Did you know that you can produce electricity by simply moving a magnet? In this lesson, learn more about electromagnetic induction and how electricity is generated.
3. What is an Eddy Current? - Definition & Application
Eddy currents can heat up metal objects without even touching them, stop fast moving trains and roller coasters, and even make your workout a little more effective. Learn all about them and how they are used in this lesson!
4. Alternating Current: Definition, Advantages & Disadvantages
Alternating current (AC) is easy to generate and use, with numerous advantages over direct current. In this lesson, we'll define AC, discuss its advantages and disadvantages, and provide a quiz.
5. Impedance in Alternating Current Circuits
In this lesson, you will learn about topics that include the difference between DC and AC circuits, the use of rms values, definitions of impedance and reactance, and calculations involving the reactance of capacitors and inductors.
6. R-L-C Series Circuits
After watching this lesson, you will be able to explain what an RLC series circuit is and use related equations to solve simple problems. A short quiz will follow.
7. 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.
8. Electromagnetic Induction: Conductor to Conductor & Transformers
Every day, we make use of a special case of electromagnetic induction known as mutual induction. In this lesson, we'll talk about this special phenomenon and how it is used in many common devices.
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