Ohms Law Report.docx

# Ohms Law Report.docx - Ohms Law Voltage Current and...

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Ohm’s Law: Voltage, Current, and Resistors PHYS 1114 - Section 02 February 22, 2018

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Figure 1: Circuit diagram Figure 2: Experimental setup - drawing of the circuit and equipment Introduction: In the early 1800s it was discovered by Georg Simon Ohm that many objects have electric currents that are proportional to the voltages across them. Though this relationship is used very often in a variety of situations due to its simplicity and practicality, there are occurrences where current is not proportional to voltage. Since Ohm’s Law is one of the rules of physics the objects for which it does hold true are referred to as being ohmic. Ohmic objects are those that have a constant value of resistance and are often referred to as resistors. Ohm’s Law is expressed by the equation: V = I R where R is the resistance written in ohms (Ω), I is the electric current expressed in Amp (A), and V is the voltage drop or difference in electric potential and is expressed in volts (V). In this experiment we set up electric circuits and examine the electric current through and the voltage drop across resistors. To determine whether or not an object is ohmic we can compare Ohm’s law with the standard equation of a straight line of slope m and y-intercept of c. In this case the slope of the straight line represents the resistance of the object in question.
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