OpenStax University Physics/E&M/Current and Resistance
(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
Chapter 9
editCurrent and Resistance
editCurrent (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
For quiz at QB/d_cp2.9
editElectric 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=