# Ch 4: AP Physics C: Magnetism

### About This Chapter

## AP Physics C: Magnetism - Chapter Summary and Learning Objectives

One of the four fundamental interactions in nature, electromagnetism is one of those invisible forces that governs much of the world. In this chapter, you'll learn the basics of magnetic fields and forces and how electricity interacts with them. You'll learn about the scientists who first discovered some of the basic electromagnetic equations. Each video focuses on a specific topic, so you can learn about magnetism one lesson at a time. This chapter is designed to teach you:

- How magnetic forces work
- The interactions of magnetic fields and electric currents
- The fundamental equations of classical electromagnetism
- How electric currents and magnetic forces are used in the real world

Lesson | Objective |
---|---|

Magnetic Force: Definition, Poles and Dipoles | Learn what a magnetic force is, including the interaction between magnetic poles. |

What Is a Magnetic Field? | Take a look at the shape and direction of field lines in a magnetic field, determining strength throughout. |

How Magnetic Fields Are Created | Understand that moving charges create magnetic fields and what this means in the real world. |

How Magnetic Forces Affect Moving Charges | Explore the effects that magnetic fields have on different particles and how we use this in everyday things. |

Electromagnetic Induction: Definition and Variables that Affect Induction | Discover how a magnet can be used to induce a voltage in a conductor. |

Electromagnetic Induction: Conductor to Conductor and Transformers | Learn how current in one conductor can cause a voltage in another and how transformers work. |

Electric Motors and Generators | Take a look at the basics of electric motors and generators and how they convert between electrical and mechanical energy. |

Faraday's Law of Electromagnetic Induction | Understand the findings of Michael Faraday in this basic law of electromagnetism. |

The Biot-Savart Law | Explore this equation that is used to calculate magnetic fields that are created by electric currents. |

Ampere's Law | Discover this classic electromagnetism law that describes how electric currents produce magnetic fields in closed loops. |

Maxwell's Equations | Learn about the set of equations that constitute the foundation of electromagnetism, as gathered and derived by James Clerk Maxwell. |

### 1. Magnetic Force: Definition, Poles & Dipoles

A magnetic force is produced when electrons are moving and many become magnets themselves. Discover more about magnetic forces, the root of magnetism, and monopoles and dipoles.

### 2. What is a Magnetic Field?

A magnetic field is created when magnets are in the same space as one another, creating a force. Learn more about a magnetic field, how to detect it with a compass, and ferromagnetic Materials.

### 3. How Magnetic Fields Are Created

Magnetic fields are generated when charged particles move around. Explore more about magnetic fields, their source, current carrying conductors, and electromagnets and how they act.

### 4. How Magnetic Forces Affect Moving Charges

A charged particle that moves through a magnetic field will be exposed to and affected by a particular force. Discover more about the effects of force on a moving charge, why relative motion is important, and the direction and strength of force.

### 5. Understanding Forces on Current-Carrying Wires in Magnetic Fields

Current-carrying wires influence the magnetic fields around them, including other current-carrying wires. Look at how parallel wires exert forces and how changing the shape of the wire can fix common problems.

### 6. Electromagnetic Induction: Definition & Variables that Affect Induction

Electromagnetic induction involves altering a magnetic field can produce a voltage and is utilized in many different applications. Explore more about electromagnetic induction, including its applications and the variables that affect induction.

### 7. Electromagnetic Induction: Conductor to Conductor & Transformers

Electromagnetic induction is the production of electromotive force by moving a magnetic field across an electric conductor. Learn more about mutual inductance, its applications, and transformers.

### 8. Electric Motors & Generators: Converting Between Electrical and Mechanical Energy

Electric motors are used for converting electrical energy to mechanical energy, while generators are used for converting mechanical energy to electrical energy. Learn about electromagnetic induction, and the role of alternating and direct currents in the conversion.

### 9. Faraday's Law of Electromagnetic Induction: Equation and Application

Electromagnetic induction refers to voltage induced by changes in the magnetic field. Learn about Michael Faraday's life and major discovery, and explore the definition, equation, and real-world applications of Faraday's law of electromagnetic induction.

### 10. Lenz's Law, Magnetic Flux and Motional EMF

Lenz's Law, magnetic flux, and motional EMF all impact how electricity is generated. Learn more about how we make electricity, examine magnetic flux, review Faraday's Law, and understand Lenz's Law before combining knowledge of all three to complete your understanding.

### 11. R-L-C Series Circuits

A resistance-inductance-capacitance (RLC) series circuit is comprised of a battery, resistor, inductor, and capacitor arranged so that there is only one path where electrical current can flow. Learn about the definition and equation of RLC series circuits, and check out some example calculations.

### 12. The Biot-Savart Law: Definition & Examples

The Biot-Savart Law describes the relationship between the electric current and the magnetic field it generates. Learn more about the definition of the Biot-Savart law, and understand how to apply its simplified equation through an example calculation.

### 13. Ampere's Law: Definition & Examples

Ampere's Law helps to describe electromagnetic force. Explore the definition of this equation and learn how to find the magnetic field created by a long, straight, current-carrying wire with the help of examples.

### 14. Maxwell's Equations: Definition & Application

Maxwell's equations describe the force of electromagnetism through differential equations. Explore the definition and application of Maxwell's equations and discover examples of these equations.

### Earning College Credit

Did you know… We have over 220 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

### Other Chapters

Other chapters within the AP Physics C - Electricity & Magnetism: Exam Prep course