# Ch 7: Magnetism

Watch natural science video lessons with short, self-assessing quizzes. Learn about the different aspects of magnetism, including the definition of a magnet and how magnets and magnetic fields are formed.

## Lessons in Magnetism

Magnets - you know what they are. You have probably played with them before, trying to get them to repel each other. You have probably used them before to hang things on your refrigerator. But, do you really understand how they work or why they are important (other than keeping important papers on the fridge)? If you aren't sure, then this chapter will help you find out the answers to those questions. Our lessons cover magnetic force and magnetic fields. You'll learn about electromagnetic induction, too. Some of the things you will learn in this chapter include:

• The definition of magnetic poles
• How magnetic strength is stronger at the poles
• How magnetic fields are created
• How particles can be affected by a magnetic field
• How magnets can be used to create energy
• Variables that can affect electromagnetic induction

VideoObjective
Magnetic Force: Definition, Poles & Dipoles Discover the concept of magnetic force and see which poles attract and which repel.
What is a Magnetic Field? Explore magnetic fields and learn about field lines, strength and magnetic domains.
How Magnetic Fields Are Created Examine how a magnetic field can be created by moving charges and the factors that can affect field strength.
How Magnetic Forces Affect Moving Charges Analyze how a charged particle that is in motion can be affected by a magnetic field.
Electromagnetic Induction: Definition & Variables that Affect Induction Find out how a magnet can be used to induce a voltage in a conductor.
Electromagnetic Induction: Conductor to Conductor & Transformers Study conductors, variables that affect induction and transformers.

6 Lessons in Chapter 7: Magnetism
Test your knowledge with a 30-question chapter practice test
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

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