| In this chapter, capacitors and inductors will be introduced (without considering the effects of AC current.) The big thing to understand about Capacitors and Inductors in DC Circuits is that they have a transient (temporary) response. |
In this chapter, capacitors and inductors will be introduced (without considering the effects of AC current). The important thing to understand about capacitors and inductors in DC circuits is that they have a transient (temporary) response. |
| During the transient period, capacitors build up charge and stop the flow of current (eventually acting like infinite resistors.) Inductors build up energy in the form of magnetic fields, and become more conductive. |
During the transient period, capacitors accumulate charge and stop the flow of current (ultimately acting as infinite resistors). Inductors, on the other hand, build up energy in the form of magnetic fields and become more conductive. |
| In other words, in the steady-state (long term behavior), capacitors become open circuits and inductors become short circuits. |
In other words, in the steady state (long-term behavior), capacitors become open circuits and inductors become short circuits. |
| Thus, for DC analysis, you can replace a capacitor with an empty space and an inductor with a wire. |
Thus, for analyzing DC circuits, you can replace a capacitor with an empty space and an inductor with a wire. |
| The only circuit components that remain are voltage sources, current sources, and resistors. |
The only remaining components in the circuit are voltage sources, current sources, and resistors. |
| DC steady-state (meaning the circuit has been in the same state for a long time), we've seen that capacitors act like open circuits and inductors act like shorts. |
In the steady state of DC current (meaning that the circuit has been in the same state for a long time), we saw that capacitors behave like open circuits and inductors behave like short circuits. |
| The above figures show the process of replacing these circuit devices with their DC equivalents. |
The above figures illustrate the process of replacing these circuit devices with their DC equivalents. |
| In this case, all that remains is a voltage source and a lone resistor. |
In this case, all that remains is a single voltage source and a single resistor. |
| (An AC analysis of this circuit can be found in the AC section.) |
The analysis of the AC current of this circuit can be found in the AC current section. |
