# Ch 16: AP Physics 2: Conservation in Electrical Circuits

### About This Chapter

## AP Physics 2: Conservation in Electrical Circuits - Chapter Summary

This chapter covers conservation in electrical circuits, including Kirchhoff's rules, resistors and multi-loop electrical circuits. You can also learn more about the use of Kirchoff's loop rule to develop experiments. Our lessons are designed by professional instructors to ensure your learning experience is fun, interesting and thorough. After you've reviewed the lessons, take the multiple-choice quizzes to ensure you've understood what you've just reviewed. If you're preparing for the AP exam, taking the quizzes before you work through the lessons helps you gauge some of the areas where you may need to study more ahead of test day. Once you complete this chapter, you should be ready to meet the following objectives of the AP Physics 2 exam:

- Apply Kirchhoff's rules and loop principals
- Describe the electric potential energy found in a multi-loop electrical circuit
- Explain current, power and potential difference across a resistor
- Explore electrical circuits and energy transfers

### 1. Electrical Circuits: Energy Transfer & Conservation

After completing this lesson, you will be able to explain what an electric circuit it, how energy transfers in a circuit, and how circuits relate to the conservation of energy. A short quiz will follow.

### 2. Energy Transfers in Circuits: Equations & Examples

In a circuit, energy is always being transformed from electrical energy into other forms, like light and thermal energy. In this lesson, learn how energy is transformed and how to calculate exactly how much energy is transformed in a circuit.

### 3. Kirchhoff's Law: Definition & Application

Kirchhoff's laws can be used to analyze complex circuits. In this lesson, you will learn about Kirchhoff's two laws and how to apply them to circuit analysis.

### 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. Kirchhoff's Loop Rule: Principles & Validity Analysis

There are two Kirchhoff's rules: the junction rule and the loop rule. In this lesson, we'll focus on the loop rule and how it's based on the law of the conservation of energy. We'll use data obtained from an RC circuit to prove the loop rule is valid.

### 6. Power, Current & Potential Difference Across a Resistor

The current through a resistor depends on the potential difference across the resistor and the resistance. Ohm's law describes this relationship, and we'll learn how to determine the relationships between power, current, and voltage.

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### Other Chapters

Other chapters within the AP Physics 2: Exam Prep course

- AP Physics 2: Properties & Structure of Systems
- AP Physics 2: Fluids & Fluid Flow
- AP Physics 2: Electric Charge
- AP Physics 2: Mass & Energy
- AP Physics 2: Properties of Objects, Space & Time
- AP Physics 2: Properties of Matter
- AP Physics 2: Vector & Scalar Fields
- AP Physics 2: Electric Fields
- AP Physics 2: Magnetic Fields
- AP Physics 2: Forces
- AP Physics 2: Newton's Laws of Motion
- AP Physics 2: Force Labs
- AP Physics 2: Electric & Magnetic Properties of a System
- AP Physics 2: Thermodynamics & Entropy
- AP Physics 2: Conservation Principles
- AP Physics 2: Conservation of Electric Charge
- AP Physics 2: Conservation of Nucleon Number
- AP Physics 2: Conservation of Linear Momentum
- AP Physics 2: Waves
- AP Physics 2: Reflection & Refraction
- AP Physics 2: Electromagnetic Radiation
- AP Physics 2: Wave Models
- AP Physics 2: Ideal Gas
- AP Physics 2 Flashcards