Electronic Formulas You Should Know
Ohm's Law for DC Circuits |
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E
|
I
|
R
|
P
|
| I * R | P / E | P / I^2 | E^2 / R |
| P / I | E / R | E^2 / P | I^2 * R |
| SQR(P * R) | SQR(P / R) | E / I | I * E |
Ohm's Law for AC Circuits |
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I
|
Z
|
P
|
E
|
| E / Z | E / I | I * E * ( cos ) |
I * Z |
| SQR[ P / ( Z * cos ) ]
| (E^2 * cos ) / P |
(E^2 * cos ) / Z |
SQR[ (P * Z) / cos ] |
| P / ( E * cos ) |
P / ( I^2 * cos ) |
I^2 * Z * cos |
P / ( I * cos ) |
Sine Wave Conversions |
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From |
To |
|||
Effective (RMS) |
Average |
Peak |
Peak-To-Peak |
|
Effective (RMS) |
.9 | SQR(2) | SQR(2) * 2 | |
Average |
1.110 | 1.571 | 3.142 | |
Peak |
1 / SQR(2) | .637 | 2 | |
Peak-To-Peak |
.354 | .318 | .5 | |
AC Sine Wave Formulas |
|
| V (RMS) | [1 / SQR(2)] * Vp |
| V (peak) | SQR(2) * Vrms |
| V (avg) | V(peak) * .636 |
| V (peak to peak) | 2 V(peak) |
| Frequency | 1 / Time |
| Time | 1 / Frequency |
Resistor Color Codes | ||
| Black | 0 | |
| Brown | 1 | |
| Red | 2 | |
| Orange | 3 | |
| Yellow | 4 | |
| Green | 5 | |
| Blue | 6 | |
| Violet | 7 | |
| Grey | 8 | |
| White | 9 | |
