3/28/08 Circuits Blog

Equivalent Resistance = V/I

Ohm's Law applies to the circuit as a whole, and to each individual resistor. We can build circuits in several different configurations. The current flow can branch out and back in.

Tuesday, March 25, 2008

Today we started off writing sentences that accuratley incorporate the word circuit. We then went to notes where we learned about circuits. An electrical circuit is a closed loop or path through which charged particles can travel through. A closed electrical circuit allows for an electrical current to form. An electrical current is formed by a source of potential differences and includes one or more resistances.

We then learned about how water is analagous to electrical flow. We also watched a video on electrical flow. This video mentioned how the invention of the battery revolutionized technology and eventually led to Thomas Edison to develop electricity lamp.

Then we learned about circuit elements. Circuit elements include:

Source elements, which produce a potential difference

Load elements, which is a device that the source is connected to

Control elements, that controls the flow of electric current such as a switch

We also learned some new terms such as Current (I) which is the flow of electric charges. It is also the time-rate at which charge flows past a given point in a circuit. We found out that other electrical terms and equations are in our reference tables. The equation I= the change in charge (q)/ time(t).