Saturday, September 18, 2010

10 Points From Pg. 553-563

There are 2 things that affect the amount of current flow in a circuit which is...
1. The potential difference of the power supply
2. The nature of the pathway through the loads that are using electric potential energy

Resistance - a measure of the opposition to current flow

          R = V/I

R - Resistance     V - Volts (V)     I - Current (A)


A thinner wire has a larger resistance rather than a thicker one, which one of the factors that differs between the amount of resistance. Another property could be the conductor for example Copper is a very conductible material.

Gauge number - The gauge number of a wire indicates its cross-sectional area.

Series circuit - a circuit in which laods are connected one after another in a single path.


Parallel circuit - a circuit in which loads are connected side by side



Kirchhoff's current law is the total amount of current into a junction point of a circuit equals the total current flows out of that same junction/

Kirchhoff's voltage law is the total amount of all electrical potential decreases in any complete circuit loopis equal to any potential increases in that circuit loop.





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