# Direct current/Basics

## Basic Equations

edit- P, Power is measured in Watts
- I, Current is represented in Amps
- E, Voltage is measured in Volts
- R, Resistance (and resistance potential) is measured in Ohms Ω
- C, Capacitance amount of stored electric charge

- P=IE ; Power= Current * Voltage
- E=IR ; Voltage= Current * Resistance

## Theory

editVoltage moves from the negative terminal to the positive terminal, but for application purposes it is viewed as positive to negative.

## Ground in DC circuitry

editAlthough it may seem counter intuitive, according to electric voltage theory, the ground on a DC circuit is the negative terminal.

## References

editMake: Electronics: Learning through discovery