The study sought to determine the internal resistance of batteries. The resistance is a function of both the voltage and current. When current flows through an electrical conductor, it experiences resistance that lowers its voltage. The resistance represents the work done to allow the current to pass through the conductor. The voltage is, however, the measure of the energy stored in a battery. The voltage will reduce due to the effect of the resistance. Therefore, it is possible to calculate the resistance of a conductor such as a battery when given the values of current against voltages. The following is the formula used to determine the resistance of a conductor when given both the voltage and current in Amperes.
Resistance = Voltage/Current
R = V/I
Hence, V = I*R
Step 1 Trail
The study involved two experiments namely Step 1 Trial and Step Two Trial. The study used the data collected from each of the two trials to determine the resistance of each of the batteries. The following are the results obtained from the trials.
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The rial has the equation of the line of best fit given as follows.
Y = -1.2563x + 1.4677
The equation above has y representing voltage (V) and x representing current (I). Hence, the study used the equation of V = I * R to determine the resistance from the experiment. As indicated in the chart above, the study found that resistance of the battery was 1.2563 Ohms.
Step 2 Trial
The second experiment resulted in the following equation as indicated by figure 2 above.
Y = -0.8389 + 1.4134
From the above equation, the study found that the battery had resistance of 0.08389 Ohms. The equation provides the value of resistance as negative since it leads to the reduction of voltage due to the work done.
