DC Circuit Analysis

Current (i or I): Means flow of charge/electron.

Voltage (V): Potential difference between two points in an electric field.

Resistor (R): Restricts the flow of electric current through it in a circuit.

Power (P): Energy conservation rate.

Conductance (G): The reciprocal of resistance.

Capacitor (C): Used to store and release electrical energy in circuits.

Note: In DC Circuit maths, capacitor becomes open.

Inductor (L): Used to store energy in the form of a magnetic field.

Note: In DC Circuit maths, inductor becomes short.

Source: A device that converts nonelectric energy to electric energy and vice versa.

Type of sources:

1. Depending on ability to deliver either a constant voltage or current:
   1. Voltage Source
   2. Current Source
2. Depending on the flow of electric charge:
   1. AC Source
   2. DC Source
3. Depending on control within a circuit:
   1. Independent Source
   2. Dependent Source:
      1. VCVS - Voltage Controlled Voltage Source
      2. VCCS - Voltage Controlled Current Source
      3. CCVS - Current Controlled Voltage Source
      4. CCCS - Current Controlled Current Source

Node: Where two or more elements of a circuit are connected.
Example: 'a' is a node.

Junction: Where three or more elements of a circuit are connected.
Example: 'a' is a junction.

Passive Convention: Current direction from +ve to -ve terminal.

Power is absorbed by the element.

Active Convention: Current direction from -ve to +ve terminal.

Power is supplied by the element.