About This Chapter
How It Works:
- Identify the lessons in Holt McDougal Physics' Electrical Energy and Current chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the electrical energy and current topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.
Students will learn:
- Formula for electric potential energy
- Charge collections and voltage
- Formula for capacitance
- Types of electric currents
- Electrical resistance
- Electric power
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1. Electric Potential: Charge Collections and Volt Unit
In this lesson, we'll find out that electric charges can be rather lazy until something motivates them to get work done. Find out what gives electric charges the potential to do work and how we measure that potential with something called voltage.
2. 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.
3. 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.
4. What is Electric Power?
Power is a word we use all the time, but do you really know what it means? We'll look at how electrical power relates to voltage, current and resistance and how knowing that relationship can help you in everyday life.
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Other chapters within the Holt McDougal Physics: Online Textbook Help course
- Holt McDougal Physics Chapter 1: The Science of Physics
- Holt McDougal Physics Chapter 2: Motion in One Dimension
- Holt McDougal Physics Chapter 3: Two-Dimensional Motion and Vectors
- Holt McDougal Physics Chapter 4: Forces and the Laws of Motion
- Holt McDougal Physics Chapter 5: Work and Energy
- Holt McDougal Physics Chapter 6: Momentum and Collisions
- Holt McDougal Physics Chapter 7: Circular Motion and Gravitation
- Holt McDougal Physics Chapter 8: Fluid Mechanics
- Holt McDougal Physics Chapter 9: Heat
- Holt McDougal Physics Chapter 10: Thermodynamics
- Holt McDougal Physics Chapter 11: Vibrations and Waves
- Holt McDougal Physics Chapter 12: Sound
- Holt McDougal Physics Chapter 13: Light and Reflection
- Holt McDougal Physics Chapter 14: Refraction
- Holt McDougal Physics Chapter 15: Interference and Diffraction
- Holt McDougal Physics Chapter 16: Electric Forces and Fields
- Holt McDougal Physics Chapter 18: Circuits and Circuit Elements
- Holt McDougal Physics Chapter 19: Magnetism
- Holt McDougal Physics Chapter 20: Electromagnetic Induction
- Holt McDougal Physics Chapter 21: Atomic Physics
- Holt McDougal Physics Chapter 22: Subatomic Physics