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EE 110L Exp1 Prelab Anon

# EE 110L Exp1 Prelab Anon - Ω±4 th Nominal Values of...

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EE110L: Experiment 1 Resistors and Basic Instrumentation 01/17/08

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Lab Section 2 Objectives: Learn to use the DMM and DC shunt milliammeter Understand the theory behind the milliammeter and how it takes measurements Learn the color code and power rating for resistors Put into practice Ohm’s law and learn about nonlinear resistors Theory: Resistors operate by turning the energy of electrons into heat. The power dissipated by this process is given by the equation P = VI = V 2 /R = I 2 R. Resistor Color Coding: Color Black Brown R O Y G B V Gray White Gold Silver Number 0 1 2 3 4 5 6 7 8 9 -1 -2 Color Nothing Silver Gold Tolerance 20% 10% 5% Resistors are read in the following form: Resistance = (1 st 2 nd )x10 3rd
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Unformatted text preview: Ω±4 th Nominal Values of Resistors for… 5% tolerance 10,11,12,13,15,16,18,20,22,24,27,30,33,36,39,43,47,51,56,62,68,75,82,91 10% tolerance 10,12,15,18,22,27,33,39,47,56,68,82 20% tolerance 10,15,22,33,47,68 Ohm’s Law: V=IR Voltage divider in series: V 1 = V total *(R 1 /(R 1 +R 2 )) Power Ratings Prelab: 1. Shunt Resistance (ohms) Max Current (mA) Small Shorting Block 1 4.8 1.0 1.8 25. 1.0 44. .173 250. .0862 500. 2. Voltage (volts) I 100 (mA) I 1000 (mA) 1 10 1 2 20 2 3 30 3 4 40 4 5 50 5 3. I(mA) V 43 (volts) V 47 (volts) V 100 (volts) 47 ohms 11 .48 .52 XXXXXXXXX 100 ohms 7 .30 XXXXXXXXX .70...
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