ELG 2138 Study Guide - Quiz Guide: Voltmeter, Voltage Source, Voltage Divider
29 Nov 2018
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Objectives: to verify experimentally the design concept of a voltage divider, to design and build a simple analog ammeter based on the current-divider concept, to verify experimentally the thevenin equivalent circuit and the maximal power transfer property. 1 trim-pot (variable resistor) with a range of 0-50k . 2 analog multimeters: two 1k resistors, 10 k and 0. 5 k . 5 = 500c1+1000c2 c1 = (5-1000c2)/500 = (1/100)-2c2. 2 c2 = 0. 6/1000 = 0. 6ma c1= (1/100)-2(0. 6ma) = 8. 8ma c3= 8. 8ma-0. 6ma = 8. 2ma. Selected values: 200ohms, 300ohms, 333ohms, 350ohms, 400ohms, 500ohms. From the calculations obtained from the prelab, we expected these results for fig. Upon performing the experiment in the lab, we measured these results: The measured results were very close to what was calculated in the prelab. The minor discrepancies may be attributed to the loading effect and possible human errors.
