About This Chapter
Praxis General Science: Magnetism & Electricity - Chapter Summary
Our professional instructors teach this series of short, engaging lesson videos to help you review the properties, forces and components of magnetism, magnetic fields, electric current and electric circuits. These lessons are mobile device compatible, thus giving you access to a portable way to ensure you can:
- Understand poles and dipoles of magnetic forces
- Define magnetic fields
- Identify the units and types of electric current and resistance
- Describe components and types of electric circuits
- Define an electromagnet and its parts
- Explore electric charge and force
- Compare insulators and conductors
- Describe Ohm's law and voltage sources
In additions to watching the lesson videos, you can also read the lesson transcripts to improve your retention of the material presented. Take the lesson quizzes to determine what topics you don't understand and then use the video tags to reinforce your understanding of those topics. Once you have finished all the lessons and quizzes in this chapter, take the chapter exam to test your overall understanding of the chapter.
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.
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.
3. What is an Electromagnet? - Definition, Uses & Parts
In this lesson, you'll learn what an electromagnet is, how it is used in a few real-life situations, and the parts that make it up. A short quiz will follow.
4. Electric Charge and Force: Definition, Repulsion & Attraction
Have you ever wondered what electricity is and where it comes from? Have you ever been zapped by static electricity and wondered how it got there? We'll answer all of these questions in this lesson on electric charge and force!
5. Electric Force: Definition & Equation
The electric force is one of the most powerful, fundamental forces in the universe. In this lesson, we will learn how charged objects exert electric forces on each other and how to calculate the strength of that force.
6. Insulators and Conductors: Examples, Definitions & Qualities
In this lesson, we'll explore the reasons that some materials conduct electrical energy with ease while others block it almost completely. We'll also talk about the property of conductivity and some everyday examples of insulators and conductors.
7. What is Electric Current? - Definition, Unit & Types
Like a river current is the flow of water molecules, electrical current is the flow of charged particles. In this lesson, we're going to explore what electrical current is, what causes it, and that, unlike a water current, electrical current doesn't always flow in one direction.
8. Electrical Resistance: Definition, Unit & Variables
We'll take a shopping trip to the mall to learn how electrical resistance works and how it is affected by resistivity, conductor dimensions, and temperature. We'll also take a look at several common appliances that take advantage of resistance to function.
9. Ohm's Law: Definition & Relationship Between Voltage, Current & Resistance
Did you know that electrical current is affected by the voltage and resistance in a circuit? In this lesson, we'll use Ohm's law, which tells us how current, voltage, and resistance are related, as we work through several electric circuit examples.
10. Electric Circuit Fundamentals: Components & Types
Electric circuits can be configured to power several loads, such as light bulbs, in series or in parallel. In this lesson, we'll look at both types of circuits and see how the voltage, current, and resistance are affected by installing additional loads.
11. Voltage Sources: Energy Conversion and Examples
We use them every day, but no one really gives them much thought. What are we talking about? Why, voltage sources, of course! Batteries and generators are two of the most common sources of voltage that power our daily lives. We'll look at them in detail to see how they work.
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Other chapters within the Praxis General Science (5435): Practice & Study Guide course
- Praxis General Science: Methodology, Techniques & History
- Praxis General Science: Matter
- Praxis General Science: Thermodynamics
- Praxis General Science: Periodicity
- Praxis General Science: States of Matter
- Praxis General Science: Bonding & Structure
- Praxis General Science: Chemical Reactions
- Praxis General Science: Acid-Base Chemistry
- Praxis General Science: Solutions & Solubility
- Praxis General Science: Mechanics
- Praxis General Science: Motion & Forces
- Praxis General Science: Optics & Waves
- Praxis General Science: Basic Structure & Functions of Cells
- Praxis General Science: Cell Reproduction & Division
- Praxis General Science: Basic Biochemistry of Life
- Praxis General Science: Basic Genetics
- Praxis General Science: Theory & Key Mechanisms of Evolution
- Praxis General Science: Hierarchical Classification Scheme
- Praxis General Science: Plant Structures & Functions
- Praxis General Science: Basic Anatomy & Physiology
- Praxis General Science: Key Aspects of Ecology
- Praxis General Science: Physical Geology
- Praxis General Science: Historical Geology
- Praxis General Science: Earth's Bodies of Water
- Praxis General Science: Meteorology & Climate
- Praxis General Science: Astronomy
- Praxis General Science: Science, Technology & Society
- Praxis General Science Flashcards