Chapter 5 Direct Currents in
Electric Circuits
Conduction of Electricity
Ohm’s Law
Non-linear Resistors
Resistors Connected
Kirchhoff’s Lawss
Substitution Theorem
Mesh Current
Voltage and Current Sources
Thevenin Theorem
Transient in RC Circuits
If the electric field E is maintained in
conductor by an external source,say,a
battery,then charges drift in the field
and there is an electric current.
Sometimes it is convenient to introduce a
quantity called conductance,which is
defined as
G = 1/R
Then for connection in parallel,one has
G = G1 + G2 + G3,