Chapter 8 DC Circuits

Objectives After completing this chapter, you will be able to: Solve for all unknown values (current, voltage, resistance, and power) in a series, parallel, or series-parallel circuit Understand the importance of voltage dividers Design and solve for all unknown values in a voltage-divider circuit

Series Circuits In a series circuit:

Series Circuits (cont’d.) Figure 8-1. Series circuit.

Series Circuits (cont’d.) In a series circuit:

Parallel Circuits In a parallel circuit:

Parallel Circuits (cont’d.) In a parallel circuit (cont’d.):

Series-Parallel Circuits Series formulas are applied to the series part of the circuit Parallel formulas are applied to the parallel part

Voltage Dividers Sets the bias or operating point of active electronic components Also used in scaling

Voltage Dividers (cont’d.) Figure 8-11. Simple circuit.

Voltage Dividers (cont’d.) Figure 8-12. Simple voltage divider.

Voltage Dividers (cont’d.) Figure 8-13. Voltage divider.

Voltage Dividers (cont’d.) Figure 8-14. Voltage divider application.

Voltage Dividers (cont’d.) Figure 8-16. Real-world voltage divider.

Figure 8-17. Analyzing the circuit.

Voltage Dividers (cont’d.) Figure 8-18. Determining the resistor values.

Wheatstone Bridge Figure 8-19. A Wheatstone bridge consists of two voltage dividers.

Summary The most commonly used circuits are the series, parallel, and series-parallel circuits Voltage dividers sets the bias of active electronic components A Wheatstone bridge measures unknown electrical resistance