We connect a 5600 ‡ resistor to the voltage power supply and increment the supplied voltage by approximately 1 V four times (reading off the voltmeter). For each voltage, a corresponding reading off the ammeter is saved in an additional matrix. The theoretical value of I is calculated in each case and used to create a matrix of difference percentages.
Comments: .
The first set of values gave a 19.658% difference, which seems higher than it should be. This is probably due to an error in taking the reading since a value of 0.4 A would give an percentage difference of about 4.27, which is much more reasonable than the value we got. .
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Part Two.
Objective:.
Studying the properties of Ohm's Law by measuring the current through resistors connected in series.
Procedure:.
We connect a 1000‡, a 5600‡ and a 10,000‡ resistor together in series. After setting the voltage across the three resistors to 12V, we measure the voltage drop across each resistor using the voltmeter and store the values in a matrix. The voltages are used to calculate the current passing through each resistor, which should be approximately the same for all three. We also calculate the difference percentages between experimental and theoretical values of current for each resistor and the results are stored in another matrix. Finally, the equivalent resistance is used to calculate the expected current through all three resistors. .
Comments: .
Because exact readings are nearly impossible, the margin of error between the readings seems reasonable. .
Part Three.
Objective:.
Studying the properties of Ohm's Law by measuring the current through resistors connected in parallel.