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Circuitslab5

# Circuitslab5 - Author Abdul Course Electrical Engineering...

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Author: Abdul Course: Electrical Engineering Lab EE-P202 Experiment 5: “Wheatstone Bridge Circuits”

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Objective : The objective of this experiment was to study the Wheatstone Bridge Circuit and its’ use in measuring an unknown resistance Equipment : The equipment in this lab included a digital multi-meter, a DC power supply, eight different resistors, a 500 Ohm Potentiometer, and a black box. The resistors included 220, 330, 470, and 1000 Ohm resistors. Procedure : Connect the circuit in Figure 5.4 and adjust the pot until the voltage from the DMM across the bridge reads zero volts. This is an indication that the bridge is balanced. Then measure the values of VDE, VEC, VDA, and VAC with the DMM. Calculate I1 and I3 by using Ohm’s Law. Verify that I1=I3 as it should be equal when the bridge is balanced. Next, disconnect the pot and measure its’ resistance with the DMM from point A to C or from point A to B. Notice that point B and C are the same point because they are connected. Use the resistance value from earlier in the procedure and VAC to find I4.
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Circuitslab5 - Author Abdul Course Electrical Engineering...

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