# Calculated equivalent resistance req 15982 356 1390

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Calculated equivalent resistance Req ---- ---- ---- ---- 159.82 35.6 139.0 444 327 100 Questions on Measurement #1: Are the calculated values in row #4 in agreement with the measurement values in row #2 of Table 1? ~ Yes, they are accurate. Measurement #2: Use voltmeter to measure DC Voltages across the elements in Fig.2 TABLE 2 Vs (V) V1 (V) V2 (V) 5.032 3.233 1.62 Questions on Measurement #2: Is V1 + V2 = Vs? Why?
Questions on Measurement #3: Can you connect the ammeter between R1 and R2 to measure the current through the loop? What value of the current do you expect to get? Why?
Measurement #4: Use Voltmeter to measure DC Voltage across the elements in Fig. 5 TABLE 4 Vs (V) V1 (V) V2 (V) 5.032 4.761 4.761 Questions on Measurement #4: Is V1 + V2 = Vs? Why? Is V1 = V2 = Vs? Why? ~ V1 + V2 = Vs is not correct Since the resistors are in parrellel, the voltage drops across across both resistors are equal to voltage of the source. V = V1 = V2 Measurement #5:Use Ammeter to measure DC Current through the loop in Fig. 6
TABLE 5 Is (A) I1 (A) I2 (A) 0.09 0.04 0.05 Questions on Measurement #4: Is I1 = I2 = Is? Why? Yes, because of the conservation of charges.
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