verification of kcl and kvl experiment

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To verify the Kirchhoff's voltage law and Kirchhoff's current law for the given circuit

Aim: verification of kirchoff's laws, apparatus required.

Circuit Diagrams

Given circuit.

1. KVL Circuit

Practical Circuit for KVL

2. KCL Circuit

Practical Circuit for KCL

Theory for Kirchhoff's Current and Kirchhoff's Volatage Law

a) Kirchhoff's Voltage law states that the algebraic sum of the voltage around any closed path in a given circuit is always zero. In any circuit, voltage drops across the resistors always have polarities opposite to the source polarity. When the current passes through the resistor, there is a loss in energy and therefore a voltage drop. In any element, the current flows from a higher potential to lower potential. Consider the fig shown above in which there are 3 resistors are in series. According to kickoff's voltage law.

V = V1 + V2 + V3

b) Kirchhoff's current law states that the sum of the currents entering a node equal to the sum of the currents leaving the same node. Consider the fig shown above in which there are 3 parallel paths. According to Kirchhoff's current law.

I = I1 + I2 + I3

Procedure for Kirchhoff's Voltage law:

1. Connect the circuit as shown in fig (2a).

2. Measure the voltages across the resistors.

3. Observe that the algebraic sum of voltages in a closed loop is zero.

Procedure for Kirchhoff's current law:

1. Connect the circuit as shown in fig (2b).

2. Measure the currents through the resistors.

3. Observe that the algebraic sum of the currents at a node is zero.

Observation Table for KVL

Observation Table for KCL

Precautions

• Avoid loose connections.
• Keep all the knobs in minimum position while switch on and off of the supply.

Viva Questions

• What is another name for KCL & KVL?
• Define network and circuit?
• What is the property of inductor and capacitor?

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Electrical Lab Experiment list

• 1 To conduct Open circuit vs Short circuit tests on single phase transformer
• 2 To measure the displacement vs to determine the characteristics of LVDT (Linear Variable Differential Transformer).
• 3 To plot the transistor (BJT) characteristics of CE configuration.
• 4 To find the forward vs reverse bias characteristics of a given Zener diode.
• 5 To perform Swinburne's test on the given DC machine
• 6 To verify the Kirchhoff's voltage law vs Kirchhoff's current law for the given circuit
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Laboratory Experiment Categories

• Electrical and Electronics
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Study and Verify Kirchhoff's Laws (KCL & KVL)

• kirchhoff's Laws.docx - 3288 kB

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