KIRCHHOFF CURRENT LAW (using PSPice)

Table of Contents

THE KIRCHHOFF CURRENT LAW... 2

THEORY.. 2

VERIFYING kcl USING PSPICE. 2

THEORY.. 2

PROCEDURE. 3

CALCULATIONS. 6

CONCLUSION.. 6

THE KIRCHHOFF CURRENT LAW

THEORY

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.

VERIFYING KCL USING PSPICE

 THEORY

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

PROCEDURE

        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.

Figure 5

    vi.            Then after pressing simulate, press V and I mentioned in the menu bar to show the voltage drop and current.

Figure 6

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CALCULATIONS

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

CONCLUSION

Hence, we proved that the current entering and leaving the circuit is same.