About This Chapter
Praxis Physics: Direct Current Circuits - Chapter Summary
Electricity is sent through direct current circuits and can be studied in a number of ways. This chapter's selection of video lessons from the Praxis Physics course looks at the rules and characteristics of these circuits and gives you an idea of what to expect when you take the Praxis Physics exam. Beginning with types of electric currents, this chapter will look at the following topics:
- Variables in electrical resistance
- Fundamentals of electric circuits
- Kirchkoff's rules and their applications
- An explanation of resistor-capacitor circuits
This chapter, like the rest of the course, is optimized to view on your mobile device. When you are ready to leave your computer, you can pick up right where you left off, or even review the same lesson again on your second screen. The timeline feature, located below the video presentation, makes it even easier to track your progress and move at your own pace.
1. 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.
2. 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.
3. 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.
4. 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.
5. 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 within the Praxis Physics (5265): Practice & Study Guide course
- Praxis Physics: Scientific Inquiry & Social Perspective
- Praxis Physics: Scientific Procedures & Techniques
- Praxis Physics: Vectors & Scalars
- Praxis Physics: Kinematics
- Praxis Physics: Motion
- Praxis Physics: Oscillations
- Praxis Physics: Work, Energy & Power
- Praxis Physics: Linear Momentum
- Praxis Physics: Rotational Motion, Collisions & Conservation
- Praxis Physics: Laws of Gravitation
- Praxis Physics: Fluid Mechanics
- Praxis Physics: Electrical Forces & Fields
- Praxis Physics: Potential & Capacitance
- Praxis Physics: Magnetism
- Praxis Physics: Optics & Waves
- Praxis Physics: Heat, Energy & Thermodynamics
- Praxis Physics: Modern Physics & Atomic Structure
- Praxis Physics: Content Knowledge Flashcards