Module 2
KCL & KVL
Remya Mohanan
Lecturer in Electrical Engg,
GWPC Thrissur
ELECTRICAL TECHNOLOGY
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Is the explanation about the theorem kvl and kcl, Summaries of Electronic Technology
The concepts of Node, Branch, Loop, Mesh and Superposition Theorem in electric circuits. It describes the definitions of these terms and how they are used to solve circuits with multiple sources. The Superposition Theorem is explained in detail with steps to solve circuits with multiple sources. The document also includes examples to illustrate the concepts.
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Module 2
KCL & KVL
Remya Mohanan Lecturer in Electrical Engg,
ELECTRICAL TECHNOLOGY
BRANCH,NODE,LOOP
SUPERPOSITION THEOREM
- (^) The superposition theorem is used to solve
the network where two or more sources are
present and connected.
- (^) Response ---->output current or voltage
- (^) element---->resistor,capacitor,
inductor,voltage source,current source
- (^) internal resistance---->resistance of voltage
/current source
SUPERPOSITION THEOREM
In a network having more than one source, the response across any element is the sum of the responses obtained from each source considered separately and all other sources are replaced by their internal resistance
- (^) Step – 1 Replace all but one of the sources by their internal resistances.
- (^) Step – 2 Determine the currents in various branches using simple Ohm’s law.
- (^) Step – 3 Repeat the process using each of the sources turn – by turn as the ONLY source each time.
eg:1 if 2 voltage sources are present in circuit
- (^) In circuit shown 2 voltage sources are present
- (^) step 1:Remove voltage source 2.find current through all branches
- (^) step 2:Remove voltage source 1.find current through all branches
- (^) step 3:add the values obtained in step 1 and 2 to get total current in all branches
SOURCE 1 ALONE
- (^) Step 1 – Take only one independent source of voltage or current and deactivate the other sources.
- (^) Step 2 – In the circuit diagram B shown above, consider the source E1 and replace the other source E2 by its internal resistance. If its internal resistance is not given, then it is taken as zero and the source is short-circuited.
- (^) Step 3 – If there is a voltage source then short circuit it and if there is a current source then just open circuit it.
- (^) Step 4 – Thus, by activating one source and deactivating the other source find the current in each branch of the network. Taking the above example find the current I1’, I2’and I3’.
Eg:2 FIND THE VOLTAGE ACROSS 4 OHM RESISTOR