## Chapter 28: Direct Current Circuits

### Study Plan

Batteries power our portable tools, appliances, and electronics. We can often represent a device connected to a battery as a resistor.

In this chapter, we will consider circuits with one or more batteries and one or more resistors. We can ask:

• How much energy can a typical battery supply? (Example 1, page 889)
• How does a battery operate? (Section 28.2, page 890)
• In a circuit with several batteries and resistors, how do we determine the current through each resistor? (Example 2, page 894; and Example 5, page 898)
• For such a circuit, what is the power supplied by each battery? What is the power dissipated in each resistor? (Example 6, page 902; and Example 7, page 904)

#### Organize

1. Prepare for lecture by reading the assigned sections from Chapter 28 in your textbook or ebook. This will provide an organizing framework for concepts introduced in lecture, and help you take better notes.
2. Take the checkup quiz and work the Checkup questions in your textbook to assess your understanding of basic concepts. Take note of any topics you need to review further.
3. Review the Examples from your textbook. These progress from simple to complex, and provide concrete illustrations of the concepts discussed.
4. Review the Problem Solving Techniques box on Kirchhoff’s Rules and Multiloop Circuits (page 900) and the Math Help box on The Exponential Function (page 910) from your textbook.

#### Learn

1. Re-read Chapter 28 and review your lecture notes.
2. Access the Online Concept Tutorials given for this chapter. Tutorials use animation and interactive exercises to help develop your understanding of fundamental topics.
DC Circuits
Sections: 28.1, 28.2, 28.3, 28.4, 28.7
3. Use the FlashCards to test your memory for new key terms and equations.
4. Work the end of chapter Problems and Review Problems assigned by your instructor. If your instructor has assigned SmartWork online homework, login from the right navigation pane.

#### Connect

1. Throughout the text Physics in Practice boxes explore real-world applications of core concepts in specific detail. In Chapter 28 see:
 Physics in Practice: Fuses and Circuit Breakers
2. Physics in the News offers additional real-world physics applications, and a daily dose of science-based news.