Ohm's+Law

__Objective:__ The objective of this lab is to verify Ohm's Law, V=IR.
Simulation here

Ohm's Law
 * Video Tutorial: **

1. Ignore switches in materials area. 2. Click and drag the wires, lightbulb, and battery to form a circuit. Attach the voltmeter (v) and ammeter (a) to the lightbulb. 3. Calculate the resistance of the lightbulb. 4. Click on the 'Popups' button at the bottom left of the screen. You can then hover the mouse over the battery to check your calculated value. Be sure to record the actual value to use in your analysis later on. 4. Repeat the experiment twice with new circuits, adding resistors. Note: Each different colored resistor has a different value of resistivity. Be sure to record those values of resistance and add them to the calculated value of the lightbulb's resistance. 5. Create graphs of V vs. I and I vs. R.
 * Data collection techniques/strategies **

**Analysis questions** 1. Is the relationship between voltage and current inverse or direct? Explain. 2. If the resistance in a circuit increases and the voltage remains constant, what will happen to the current? 3. If the current was doubled what would need to happen to resistance to keep voltage constant?

**Graphical analysis** <span style="font-family: Verdana,Geneva,sans-serif;">Create two graphs: V vs. I and V vs. R. <span style="font-family: Verdana,Geneva,sans-serif;">This will demonstrate the inverse and direct relationships of voltage, current, and resistance.

<span style="font-family: Verdana,Geneva,sans-serif;">**Percent difference** <span style="font-family: Verdana,Geneva,sans-serif;">Calculate the percent difference between your calculated value for R and the actual value.

<span style="font-family: Verdana,Geneva,sans-serif;">SAMPLE LAB REPORT:

<span style="font-family: Verdana,Geneva,sans-serif; line-height: 0px; overflow: hidden;">[|Ohms Law.doc]