Table of Contents
THE KIRCHHOFF CURRENT LAW
THEORY
VERIFYING kcl USING
PSPICE
THEORY
PROCEDURE
CALCULATIONS
CONCLUSION
This law is
also called Kirchhoff's first law, Kirchhoff's point
rule, or Kirchhoff's junction rule (or nodal rule). ... At any node
(junction) in an electrical circuit, the sum of currents flowing into that node
is equal to the sum of currents flowing out of that node.
WHAT IS PSPICE:
PSpice
is a SPICE analog circuit and digital logic simulation program for Microsoft
Windows. The name is an acronym for Personal SPICE - SPICE itself being an
acronym for Simulation Program with Integrated Circuit Emphasis. PSPICE is a
circuit analysis tool that allows the user to simulate a circuit and extract
key voltages and currents. Information is entered into PSPICE via one of two
methods; they are a typed 'Net List' or by designing a visual a schematic which
is transformed into a netlist.
Figure 1
i.
Open up Pspice schematics.
Figure 2
|
ii.
Click on get new part.
Figure 3
|
iii.
Then place the option which you want to
have.
Figure 4
|
iv.
Here we need three resistors, DC voltage
source and ground link.
v.
After selecting the things and options we
want, press on simulate.
vi.
Then after pressing simulate, press V and I
mentioned in the menu bar to show the voltage drop and current.
Figure 6
|
Figure 7
Figure 8
Figure 9
S no
|
Vs
|
R1
|
R2
|
R3
|
I1
|
I2
|
I3
|
I1=I2+I3
|
1
|
5
|
1k
|
1k
|
1k
|
3.333
|
1.667
|
1.667
|
1.667+1.667 =3.33
|
2
|
5
|
2.73k
|
2k
|
1.5k
|
1.39mA
|
597.3uA
|
795.5uA
|
795.5+597.3
=1.39mA
|
3
|
5
|
2730
|
2730
|
2730
|
1.22mA
|
610.5uA
|
610.5uA
|
610.5u+610.5u = 1.22mA
|
|
|
|
|
|
|
|
|
|
Hence, we proved that the current entering and leaving the
circuit is same.