Ohm's+Law+Ji-Won+Park+Raul+Ramirez

Title of Lab : Ohm's Law Lab

Researchers: Ji-Won Park and Raul Ramirez

Research Question : Experimentally find the relationship between the voltage across an Ohmic device and the current flowing through the device.

Research:

Source: []

Source: []

Hypothesis: The voltage is directly proportional to the amount of current put through the same circuit.

Procedure: 1. Connect wire leading from the voltage source to the anmeter 2. Connect anmeter to resistor 3. Connect resistor back to the voltage source 4. Set voltage to a specific level. 5. Use voltmeter and anmeter to measure volts and amps 6. Record results 7. Repeat steps 4-6

Materials- Ammeter, Voltmeter, resistor, wires, alligator clips, voltage source
 * Current (amps) || Voltage (volts) ||
 * .02 || .398 ||
 * .04 || .517 ||
 * .06 || .817 ||
 * .08 || .892 ||
 * .10 || 1.155 ||
 * .12 || 1.355 ||
 * .14 || 1.535 ||
 * .16 || 1.684 ||
 * .18 || 1.813 ||
 * .20 || 2.183 ||


 * [[image:chsdragonj1kinney/Untitled.jpg]]

The equation of the line is y=10.873x. The y-intercept is at (0,0) because at 0 amps, there is no transfer of Coulombs, which means there is no potential difference, meaning no reading for voltage. Our resistor, with its bands of Tan-Black-Black-Gold, has a resistance of 10 Ohms and a tolerance of 5% (Gathered by using the chart from above). Our percent error is 8.73%. This could have been caused by inconsistent reading on the voltmeter, resistance in the casing of the wire itself, and imprecise ammeter readings.

Conclusion: The experiment supported our hypothesis that the current and voltage are directly proportional to each other. The relationship between the voltage and current going through an Ohmic device can clearly be seen. However, we still had error. Some ways to improve upon this experiment could have been to use newer wires, newer resistors, and a more precise ammeter. 