# lab 3 ohms law - PHYSICS LAB-3 Ohms Law Ana Aguilar Members...

• Lab Report
• 5
• 89% (19) 17 out of 19 people found this document helpful

This preview shows page 1 - 3 out of 5 pages.

PHYSICS LAB-3 Ohm’s Law Ana Aguilar Members: Ana Aguilar, John Corey TA: Yiqin Xu FRIDAY: 2:00-3:50 PM DATE OF LAB: SEPTEMBER 19, 2014 Abstract: Ohm’s Law states that the voltage drop over a resistance is proportional to the current. Where voltage drop is V in volts, resistance is R in ohms and current is I in amperes. We studied this experiment in three different parts. A single resistor, a light bulb and a piece of graphite were used to do this experiment. In the last part of this experiment a voltage is applied to the section of graphite and its resistivity is calculated using tabulated data. We found that the resistivity of the graphite was 3.95 *10^-4 ± 6.147*10^-5 Ω.
Objective: To study and understand the relationship between voltage, resistance and current using Ohm’s Law which states that V=IR. In the first part we examine a resistor and we graph I vs. V studying the relationship between these two. In the second part, we do the same thing with a light bulb. In the third part, we measured the current in five different lengths and we use this to calculate the resistivity (ρ) of the piece of graphite.
• • • 