Copyright

Ch 20: Magnetic Forces and Fields

About This Chapter

Check out this collection of lessons on magnetic poles, dipoles and field strength. Use them to review the physics behind electromagnetic induction and the applications of laws like Ampere's Law and Faraday's Law.

Magnetic Forces and Fields - Chapter Summary

Take another look at the subatomic particles responsible for magnetic forces and magnetic fields with this chapter's fun video lessons. You'll review Faraday's law of electromagnetic induction and re-examine energy generation in electric motors and generators. Our experienced instructors will also help you go over the applications of the Biot-Savart law, Ampere's law and Maxwell's equations. Lessons in this chapter cover the following topics:

  • Magnetic poles and dipoles
  • Magnetic field strength
  • Electromagnetic induction
  • Electric motors and generators
  • The Biot-Savart law
  • Ampere's law
  • Maxwell's equations

Supplement your textbook study with illustrated videos that allow you to quickly review key magnetism terms and concepts. The transcripts also make it easy to access lesson material, and the multiple-choice quizzes are included to help check your understanding of these topics.

11 Lessons in Chapter 20: Magnetic Forces and Fields
Test your knowledge with a 30-question chapter practice test
Magnetic Force: Definition, Poles & Dipoles

1. Magnetic Force: Definition, Poles & Dipoles

You're probably familiar with magnets, but have you ever stopped to consider how they work? In this lesson, we'll look at the root of magnetism and some of the fundamental properties of magnets.

What is a Magnetic Field?

2. What is a Magnetic Field?

Magnetic fields fill the space around all magnets, but they're impossible to detect with our own senses. We'll use a common tool to map out a magnetic field and then discuss ferromagnetic materials to see how a magnetic field can be used to create new magnets.

How Magnetic Fields Are Created

3. 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.

How Magnetic Forces Affect Moving Charges

4. How Magnetic Forces Affect Moving Charges

A magnetic field exerts a force on a moving charged particle in ways that you might not expect. In this lesson, we're going to look at the direction of this force and the factors that affect its strength.

Electromagnetic Induction: Definition & Variables that Affect Induction

5. Electromagnetic Induction: Definition & Variables that Affect Induction

We use electromagnetic induction every day, but do you have any idea what it is? In this lesson, we'll discuss this everyday phenomenon, the factors that affect its strength and its most common applications.

Electromagnetic Induction: Conductor to Conductor & Transformers

6. 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.

Electric Motors & Generators: Converting Between Electrical and Mechanical Energy

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.

Faraday's Law of Electromagnetic Induction: Equation and Application

8. 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.

The Biot-Savart Law: Definition & Examples

9. The Biot-Savart Law: Definition & Examples

After watching this lesson you will be able to explain what the Biot-Savart Law is, and use the simplified version to solve problems. A short quiz will follow.

Ampere's Law: Definition & Examples

10. Ampere's Law: Definition & Examples

After watching this video, you will be able to explain what Ampere's Law is, and use Ampere's Law for a long, straight, current-carrying wire to solve problems. A short quiz will follow.

Maxwell's Equations: Definition & Application

11. Maxwell's Equations: Definition & Application

After watching this video, you will be able to explain what Maxwell's equations are, the basic principles behind each one, and what benefits they have led to in society. A short quiz will follow.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Support