A electrical circuit is a closed loop where electrons can flow through. They are used to power things from our microwave to our computer.
Ideal Circuit elements: Used to model real physical components
Series vs. Parallel Connection
Two elements are called connected in series if they are the only two elements connected to a node. Series connected elements have the same current ().
Two or more elements are connected in parallel if they are connected between the same two nodes. Parallel-connected elements have the same voltage.
Active vs. Passive Components
Passive components are made to receive energy from active components. They do not require any form of external electrical power to operate.
List of passive components:
Electronic component that supplies energy to a circuit.
Common examples of active components include:
Electronic devices (such as transistors or amplifiers) are modeled by a dependent / controlled voltage source.
- A diamond shape is used to indicate a dependent source.
Circuit Elements and Diagrams
We use circuit diagrams to provide a more abstract picture of reality in analyzing and describing circuits. A circuit diagram is a logical picture of what is connected to what.