Ch 23: Praxis General Science: Magnetism & Electricity

About This Chapter

This chapter will help you reinforce your knowledge about magnetic forces, magnetic fields, electromagnetic induction, electric current, Kirchhoff's rules and electric circuits, as you prepare for the Praxis General Science exam.

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.

9 Lessons in Chapter 23: Praxis General Science: Magnetism & Electricity
Test your knowledge with a 30-question chapter practice test
Magnetic Force: Definition, Poles & Dipoles

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.

What is a Magnetic Field?

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.

How Magnetic Fields Are Created

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.

Electromagnetic Induction: Definition & Variables that Affect Induction

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.

What is Electric Current? - Definition, Unit & Types

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.

Electrical Resistance: Definition, Unit & Variables

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.

Electric Circuit Fundamentals: Components & Types

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.

Applying Kirchhoff's Rules: Examples & Problems

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.

Resistor-Capacitor (RC) Circuits: Definition & Explanation

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.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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