EXPERIMENT 9: KIRCHOFF’S RULES

Introduction

Kirchhoff’s Law is defined through two separate components which are Kirchhoff’s Current Law and Kirchhoff’s Voltage Law. These two laws are collinearly related through its total summation being which is equal to 0, except that for Kirchhoff’s Current Law having its variables to be of currents flowing into and outward a node (fig.1), and for Kirchhoff’s Voltage Law having its variables in terms of the drops and rises of its voltages in a closed loop (fig. 2).

∑▒I_in +∑▒I_out =0 Figure 1: Kirchhoff’s Current Law

∑▒V=0 Figure 2: Kirchhoff’s Voltage Law

For experiment 9 entitled Kirchhoff’s Rules, the activity hoped to exemplify and prove Kirchhoff’s Law in mainly one aspect of his law which
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With the materials gathered, set-up VOM to its Ohmmeter function and check the continuity of all the wire connectors that will be used. Next step would be to set resistors 1 and 3 to 500 ohms and resistor 2 to 1000 ohms where one terminal of each battery will remain disconnected to the circuit until notice. After which, one has to connect the terminals of the batteries and gather then data of the voltage measurements of V1 and V2 using the voltmeter (fig.3). After the experiment proper, the student must have to start computing for the necessary values and correct polarities of the resistors through Kirchhoff’s Laws of both current and voltage then evaluate the necessary corrections (if any) in the proposed set
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As seen on fig. 9, the percentage difference of I_1 isn’t as much as both I_2 and I_3 seeing as I_1 only has a percentage of 4.17% in comparison to its calculated and measured value. But given that the percentage difference of I_2 and I_3 is remarkably high, there must have been massive faults in either computation or data gathering—and because of this, the student has concluded that the experiment had failed but only through and in the most probable sense because of the experimenter’s defence; self-fault in computations and data