Engineering Labs, Verification of Kirchhoff’s Current Law, KCL Lab

In this lecture, there is a 7 mint video about Kirchhoff’s Current Law. It contains the detailed video of performing Lab on Breadboard and Lab Manual as well. Watch the video given below and read the Lab Manual. If you have any further query, please ask from us by commenting below.

See Also:Verification of Kirchhoff’s Voltage Law Lab Experiment:

KCL Lab Experiment Video:

KCL Lab Report:

Objective:To verify the Kirchhoff’s current law.KCL

Discussion:

The Kirchhoff’s current law (KCL) states that the algebraic sum of all currents entering and leaving any point must equal zero. Stated in another way it can be said that the sum of currents entering a point must equal the sum of current leaving the point. To be able to apply this law to a complex circuit a convention as to the signs of current entering or leaving a point has to be adopted. One may consider all current entering a branch point as positive and all those leaving the point as negative .with these convention then we can take the algebraic sum of the current at a branch point and put it equal to zero, or put all current entering the branch on one side of an equation and those leaving the branch point on the other.

See Also:How to Measure Voltage, Resistor, Current & Continuity using a Multimeter

Apparatus:

  • Two Isolated Power Supplies
  • C. voltmeter
  • Three D.C Ammeters
  • Digital Ohmmeter
  • Resistors R1=82 R2=100   R3=150
  • Breadboard
  • Jumper Wires

 Procedure:

  1. Make up the circuit shown in the figure.
  2. Measure the resistance of each resistor and voltage of each source and record them in table l.
  3. Record the magnitude and direction of the currents as indicated by the ammeters in table ll.
  4. Using the measured value of the voltages and the resistances, calculated by Kirchhoff’s laws, the magnitude and direction of the current at each ammeter position, and record them in appropriate columns of table ll.

Analysis, Deductions and Conclusion:

  1. Has the Kirchhoff’s law been verified?
  2. What facts determined from the results of this experiment support this decision?
  3. Do the experimental results compare favorably with those calculated?
  4. What could be some of the cause for discrepancies?
  5. Are there any circuit configurations for which Kirchhoff’s, two laws are not applicable support your results with reasons.
  6. For what type of circuit configurations would it be prudent not to apply Kirchhoff’s laws?

 See Also:How to find Value of Resistor by Color Coding Resistor Color Coding Tutorial

Source

E1

volts

Source

E2

volts

Resistor

R1

ohms

Resistor

R2

ohms

Resistor

R3

ohms

         

 

Ammeter Readings
Measured value Calculated value
Meter

A1

(Amp)

Meter

A2

(Amp)

Meter

A3

(Amp)

Meter

A1

(Amp)

Meter

A2

(Amp)

Meter

A3

(Amp)

           
           

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