Circuit theory test 1

Three basic attributes of the ideal basic circuit element

-It has only two elements -It is descibed mathematically in voltage and current -it cannot be subdivided into other elements

Parallel circuit resistance

1/Tr=1/r+1/r...

Active Elements v Passive Elements

Active-devices capable of generating electric energy Passive-devices not ca0able of generaring electric energy.

Current

Charges in motion

Power + -

CiecuitIf power is positive power is being deliverred to the circuit. If power is negative power is being extracted from the circuit.

Electrical Systems Classifications

Communication,Computer,Control,Power,Signal

Voltage

Seperation of charge

Kirchiffs Current Law

The same amount of current entering a component must come out of the component.

Power

The time rate of expending or absorbing energy P=VI

Series circuit resistance

Tr=r+r+r...

Ohms law

V=IR