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page 12

-All components are labelled with variable names or values.

•Consider the example,

R1 = 10Ω

R2

 

+

 

 

 

 

 

Vs

 

R3

C1

 

 

 

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. CIRCUIT ANALYSIS

•The techniques of circuit analysis focus on trying to derive equations that describe a circuit.

•In general most of the techniques attempt to simplify analysis by breaking the circuit into parts, loops, etc.

•Some well known techniques include,

-mesh currents

-node voltages

-superposition

-thevinen and norton equivalents

3.1 KIRCHOFF’S LAWS

• Kirchoff’s Current Law: “The sum of currents at any node in a circuit must equal zero” - keep in mind that current is a flow rate for moving electrons. And, electrons do not appear and disappear from the circuit. Therefore, all of the electrons flowing into a point in the circuit must be flowing back out.