# Circuits Lab Report #1

**Topics:**Volt, Voltage, Electrical resistance, Resistor, UCI race classifications /

**Pages:**4 (760 words) /

**Published:**Oct 7th, 2012

Kwan Woo Lee

Lab Report#1 Measurements in resistive networks and circuit laws laboratory

Abstract:

The purpose of this lab is to verify the Ohm's Law, Kirchhoff's Voltage and Current Laws. As well as the introduction to the voltage division. The Ohm's Law states that the current through a conductor between two points is directly proportional to the potential difference across the two points (V = IR). The Kirchhoff's Voltage Law states that the directed sum of the electrical voltage around any closed network is zero. The Kirchhoff's Current Law states that the algebraic sum of currents in a network of conductors meeting at a point is zero. This lab report presents the lab results of 4 different parts of the lab and they provide experimented data, both numerical and visual, that verifies the Ohm's Law, Kirchhoff's Voltage and Current Laws.

Lee 2

Data:

Ohm's Law (part I)

Figure 1.1 Table 1.1 Vs -10V -5V 0V 5V 10V I -3.16mA -1.58mA 0.09mA 1.58mA 3.16mA V -6.86V -3.42V 0.19V 3.42V 6.86V

Current vs. Voltage

10 y = 2.169x - 0.001 voltage (V) 5 0 -2 -5 -10 current (mA) 0 2 4

-4

Graph 1.1 -The plot on the does not go through the origin, but it should. Ideally, when the voltage source is equal to 0V, both the voltage and the current should be 0V and 0mA respectively which will make the plot go through the origin; however, because of the resistance from the voltmeter, the actual readings of voltage and the current when measured are a bit off from 0V(0.19V) and 0mA(0.09mA). -Unknown resistance (actual given value is equal to 2.2 kΩ) is the slope of the linear line of the graph, R ≈ 2.169kΩ

Lee 3

Ohm's Law (part II)

R = 2.2kΩ Figure 1.2 Table 1.2 Vs I -10V -4.73mA -5V -3.15mA 0V -1.48mA 5V -0.01mA 10V 1.58mA

V -5.30V -1.86V 1.72V 4.98V 8.41V

Current vs. Voltage voltage (V) 10 y = 2.197x + 5.188 5 0 -5 -4 -3 -2 -1 -5 -10 0 1 2

-6

current (mA)

Graph 1.2 Compare: The resistances that can be derived from the Graph 1.1