(Vol. 2):
5:Electric Charges and Fields
6:Gauss's Law
7:Electric Potential
8:Capacitance
9:Current and Resistance
10:Direct-Current Circuits
11:Magnetic Forces and Fields
12:Sources of Magnetic Fields
13:Electromagnetic Induction
14:Inductance
15:Alternating-Current Circuits
16:Electromagnetic Waves
Subpages
Current (1A=1C/s)
where
(density, charge, drift velocity) of the carriers.
▭
,
is the perpendicular area, and
is current density.
is electric field, where
is resistivity.
▭ Resistivity varies with temperature as
. Similarily,
where
is resistance (Ω)
▭ Ohm's law
▭ Power ![{\displaystyle =P=IV=I^{2}R=V^{2}/R}](https://wikimedia.org/api/rest_v1/media/math/render/svg/91b9006cfd4fac20fcb6c2143c6d4b9538450ec6)
Electric current: 1 Amp (A) = 1 Coulomb (C) per second (s)
Current=
, where
= (density, charge, speed, Area)
where
=current density.
= electric field where
= resistivity
, and
,
where
is resistance
and Power=