# Electronics/Units

**Electronics** | Foreword | Basic Electronics | Complex Electronics | Electricity | Machines | History of Electronics | Appendix | edit

**These are the units you would find when doing problems in electronics.**

The majority of these units are named after famous people in the field who either discovered the units or had someone else name the units after them.

One reason people don't understand math or Physics very well is that it literally is Greek to them.

*(Do we want these separated from the definitions page? or should we include all of these on the definitions page and just have a separate units page too?)*

*My take on the units page is that it is a guide for doing math problems. Imagine doing a math problem and coming across Ξ. That's where the units page comes in handy as you only have to search through a small number of units to find the unit you want. Ideally all the definitions in Units should find their way into the main definitions page.*

*Ok. So we should copy all of these to the definitions page as well? Things like frequency, length, time and wavelength are not units; they should be in the definitions section and not here. Hertz, meters, and seconds are units.*

**Ampere, Amp** (A): The SI unit for current I. Equals a coulomb (1 C) of charged particles moving past a point in one second (1 s).

**Coulomb** (C): The SI unit for charge Q.

1 C = 6.24 x 10^{18} Q

**Cycles per second** (cps): As the name implies, a measurement of frequency in full cycles of a wave per second. This is equivalent to Hertz, but Hertz is the official unit. The unit cps (or kilocycles, megacycles, etc.) is more often seen in older documents.

**Farad** (F): The SI unit for Capacitance (C). One Farad equals a capacitor that has a Coulomb (1 C) of charge on it with a voltage separation of a Volt (1 V).

**Frequency**

**Henry** (H): The SI unit for inductance.

**Hertz** (Hz): The SI unit for frequency. One Hz is one cycle per second.

**Horse Power** (HP): The power a horse can achieve.

1 HP = 746 W

**Joule** (J): The work required to move a Newton (1 N) a meter (1 m).

J = N m

**Length**: (l): The symbol for distance in meters (m).

**Meter** (m): The SI unit for distance. The distance light travels in 1/299,792,458 second.

**Ohm** (Ω): A measure of resistance or impedance.

1 Ohm =

**Second** (s): The SI unit for time.

**SI**: The standard system of units.

**Time** (t): The symbol for time in seconds (s).

**Volt** (V): A potential due to an electric field.

**Watt** (W): A measure of power (P). A Watt is a Joule (1 J) of work done in a second (1 s).

**Wavelength** (λ): The distance between two peaks of a cycle.