This document defines common units and symbols used in electricity and circuit theory, including the coulomb (C) for charge, ampere (A) for current, ohm (Ω) for resistance, volt (V) for potential difference, joule (J) for energy, and watt (W) for power. It provides conversion factors between standard and other units, such as 1 C = 6.25×1018 electrons, 1 A = 1 C/s, and 1 W = 1 J/s.

1. MAGNITUDEAK IKURRA FORMULA UNITATEA NS SINBOLOA BALIOKIDEAK
KARGA
ELEKTRIKOAK
Q Coulomb-a C
1 C = 6,25·10 18
elektroi
1μC=10-6
C
INTENTSITATEA
I I = Q/t Anpere-a A 1 A = C/ s
ERRESISTENTZIA
R R = ρ·L/S Onmio-a Ω
POTENTZIAL-
DIFERENTZIA
EDO TENTSIOA
ΛV ΛV = I·R Volt-a V 1 V= A· Ω
ENERGIA E
E= I2
·R·t
E= I·t· ΛV
E=P·t
E= ΛV2
·t/R
Joule
Kwh
J
POTENTZIA
P
P= E/t
P=I2
·R
Watt-a
W W=J/S
Kwh=3,6·106
J