About This Chapter
How It Works:
- Identify the lessons in Prentice Hall Conceptual Physics' Electric Current chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the electric 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:
- Types of electric current
- Examples of voltage sources
- Variables that affect electrical resistance
- Ohm's law
- Benefits and drawbacks of alternating current
- Formulas for calculating electric power
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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. 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.
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. 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.
5. Alternating Current: Definition, Advantages & Disadvantages
Alternating current (AC) is easy to generate and use, with numerous advantages over direct current. In this lesson, we'll define AC, discuss its advantages and disadvantages, and provide a quiz.
6. 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 Prentice Hall Conceptual Physics: Online Textbook Help course
- Chapter 1: About Science
- Chapter 2: Mechanical Equilibrium
- Chapter 3: Newton's First Law of Motion-Inertia
- Chapter 4: Linear Motion
- Chapter 5: Projectile Motion
- Chapter 6: Newton's Second Law of Motion - Force and Acceleration
- Chapter 7: Newton's Third Law of Motion - Action and Reaction
- Chapter 8: Momentum
- Chapter 9: Energy
- Chapter 10: Circular Motion
- Chapter 11: Rotational Equilibrium
- Chapter 12: Rotational Motion
- Chapter 13: Universal Gravitation
- Chapter 14: Satellite Motion
- Chapter 15: Special Relativity - Space and Time
- Chapter 16: Relativity - Momentum, Mass, Energy, and Gravity
- Chapter 17: The Atomic Nature of Matter
- Chapter 18: Solids
- Chapter 19: Liquids
- Chapter 20: Gases
- Chapter 21: Temperature, Heat, and Expansion
- Chapter 22: Heat Transfer
- Chapter 23: Change of Phase
- Chapter 24: Thermodynamics
- Chapter 25: Vibrations and Waves
- Chapter 26: Sound
- Chapter 27: Light
- Chapter 28: Color
- Chapter 29: Reflection and Refraction
- Chapter 30: Lenses
- Chapter 31: Diffraction and Interference
- Chapter 32: Electrostatics
- Chapter 33: Electric Fields and Potential Energy
- Chapter 35: Electric Circuits
- Chapter 36: Magnetism
- Chapter 37: Electromagnetic Induction
- Chapter 38: The Atom and the Quantum
- Chapter 39: The Atomic Nucleus and Radioactivity
- Chapter 40: Nuclear Fission and Fusion