About This Chapter
Magnetism Basics - Chapter Summary
Our instructors have developed bite-sized lessons you can access anytime to strengthen your understanding of magnetism. This chapter offers a comprehensive overview of the Biot-Savart law, physics right-hand rule, how to calculate magnetic fields from currents and more. Accompanying each lesson is a short quiz designed to check your knowledge of concepts covered. Our subject-matter experts can answer any questions you have about specific lesson topics. All resources in this chapter are accessible 24/7 using any computer or mobile device. Upon completion, you will be able to:
- Describe the creation of magnetic fields
- Discuss the basics of electromagnetic induction
- Share examples of the Biot-Savart law
- Define the physics right-hand rule
- Explain how the Lorentz force law is used to examine electric and magnetic forces
- Calculate magnetic fields from currents
- Exhibit knowledge of Lenz's law, motion EMF and magnetic flux
- Detail the process of calculating induction currents, voltage and loops
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. Physics Right-Hand Rule: Definition & Practice
Many of the equations and tools used in physics are pretty complex, but not all of them. In this lesson, we will explore physics' right-hand rule and then put it into practice.
3. Using the Lorentz Force Law to Examine Electric & Magnetic Forces
Electricity and magnetism are closely related. Electric charges generate electric fields, and moving charges generate magnetic fields. In this lesson, we will learn how to calculate the strength of a magnetic field and use the Lorentz force law, which deals with the two forces on a charge moving through a magnetic field.
4. 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.
5. How to Calculate Magnetic Fields from Currents
Electric current generates a magnetic field. In this lesson, we'll investigate how to determine the direction of a magnetic field based on current direction and the strength of the field based on the current value and its distance from the wire.
6. 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.
7. 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.
8. How to Calculate Induction Currents, Voltage & Loops
When closed loop conductor experiences a change in magnetic flux, a voltage is produced, which induces an electrical current. In this lesson, we will investigate how voltages and electrical currents are generated by changes in magnetic flux.
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Other chapters within the Physics 112: Physics II course
- Energy Transfers in Physics
- Heat Transfer & Interaction
- The Basics of Thermodynamics
- Ideal Gas Law & Kinetic Theory
- Light & Electromagnetic Waves
- Mirrors & Lenses in Geometric Optics
- Basics of Electrostatics
- Series, Parallel & Combined Circuits
- Capacitors, Inductors & Alternating Current
- Modern Quantum Theory
- Basic Nuclear Physics
- General & Special Relativity
- Studying for Physics 112