10 Points From Pg553-563

current flow is dependent on the voltage of the power supply and the 'nature of the pathway through the loads that are using electric potential energy'

R is the resistance in volts/ampere, Ohm（Ω）is the unit of the resistance.

Electrical resistance is the measure of an opposition in the flow.

series circuits connect loads in a single path

parallel circuits connect them parallel to each other.

Kirchhoff's current law: the total amount of current that flows through a junction point is the same as the amount of current that flows out of that same junction .

Kirchhoff's voltage law: the total amount of potential decrease in a circuit loop is equal to the total amount of potential increase in that same loop .

the resistance of a conductor depends on its length, cross-sectional area, the material it is made of, and its temperature.

Thinner wire has a larger resistance than thicker wire.

The gauge number of a wire indicates its cross-sectional area. In other words, a small cross-section has a large gauge number.