Ch 23: Praxis General Science: Magnetism & Electricity
About This Chapter
Praxis General Science: Magnetism & Electricity - Chapter Summary
Our professional instructors teach this series of short, engaging lesson videos to help future science teachers 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 study:
- Poles and dipoles of magnetic forces
- Magnetic fields and how they are created
- Variables that affect electromagnetic induction
- Units and types of electric current
- Units and variables of electrical resistance
- Components and types of electric circuits
- How to solve problems with Kirchhoff's rules
- Resistor-capacitor circuits
In additions to watching these lesson videos, you can also read the lesson transcripts to improve your retention of the material presented in them. Following that, you should 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 the lessons and quizzes of this chapter, take the practice chapter exam to test your overall understanding of the chapter.
Praxis General Science: Magnetism & Electricity Objectives
The Praxis General Science exam is used to ensure that future secondary level science teachers possess the knowledge of the general science needed to teach students. When taking this computer-based exam, you will be expected to answer 135 multiple-choice questions in a two-hour and 30-minute testing session. Of the material covered in this exam, 38% will be about the physical sciences and will include some questions about magnetism and electricity.
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. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. Applying Kirchhoff's Rules: Examples & Problems
Ohm's Law can be useful for analyzing simple circuits, but when circuits are more complex, as they often are, we can instead analyze the circuits using Kirchhoff's rules. Learn about Kirchhoff's rules in this lesson.
9. Resistor-Capacitor (RC) Circuits: Definition & Explanation
Resistor-capacitor (RC) circuits are everywhere because they are useful in our everyday lives. The current in these circuits varies with time, making them both practical and common in many types of electronic equipment.
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Other Chapters
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: Energy
- Praxis General Science: Atomic Structure
- Praxis General Science: Radioactivity
- Praxis General Science: Thermodynamics
- Praxis General Science: Periodicity
- Praxis General Science: Gases
- Praxis General Science: Bonding & Structure
- Praxis General Science: Chemical Reactions
- Praxis General Science: Chemical Kinetics
- Praxis General Science: Chemical Reaction Equilibrium
- Praxis General Science: Oxidation Reduction
- Praxis General Science: Acid-Base Chemistry
- Praxis General Science: Solutions & Solubility
- Praxis General Science: Mechanics
- Praxis General Science: Newton's Laws & Motion in Physics
- Praxis General Science: Linear & Angular Momentum
- Praxis General Science: Oscillations
- Praxis General Science: Laws of Gravitation
- Praxis General Science: Work, Energy & Power
- Praxis General Science: Fluid Mechanics
- Praxis General Science: Electrical Forces & Fields
- Praxis General Science: Potential & Capacitance
- Praxis General Science: Optics & Waves
- Praxis General Science: Cell Biology
- Praxis General Science: Prokaryotic Cells
- Praxis General Science: Protists, Fungi & Viruses
- Praxis General Science: Plant Cells
- Praxis General Science: The Transcription & Translation Process
- Praxis General Science: Cell Reproduction & Division
- Praxis General Science: Basic Biochemistry of Life
- Praxis General Science: Basic Genetics
- Praxis General Science: DNA Replication
- Praxis General Science: Theory & Key Mechanisms of Evolution
- Praxis General Science: Hierarchical Classification Scheme
- Praxis General Science: Plant Structures & Functions
- Praxis General Science: Human Body Systems
- Praxis General Science: Human Reproductive Systems & Development
- Praxis General Science: Key Aspects of Ecology
- Praxis General Science: Minerals & Rocks
- Praxis General Science: Earth's Structure & Internal Processes
- Praxis General Science: Changing Earth's Surfaces
- 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
