PHYSICS HW QUESTION: A group of students performed the same experiment that you

Question

PHYSICS HW QUESTION:

A group of students performed the same experiment that you did in class. They obtained the results that are displayed in red below. Analyze this data by performing the indicated calculations. Remember that there is a link to your lab manual at the bottom of this question, if you need to refer back to the lab background and introduction.
    
Use the exact values you enter to make later calculations.

                   

Voltage, A - B 1.553 V A group of students performed the same experiment that you did in class. They obtained the results that are displayed in red below. Analyze this data by performing the indicated calculations. Remember that there is a link to your lab manual at the bottom of this question, if you need to refer back to the lab background and introduction. Use the exact values you enter to make later calculations. Measured Data: Kirchhoff's Laws - Voltage and Current in Circuits The voltage across and the current through each resistor are shown in the schematic diagrams below. Using the schematic of the circuit, calculate the total resistance of the circuit Based on the theoretical value of R3 and the voltage measured at R3, calculate the theoretical value of the current I3 using Ohm's Law.

Explanation / Answer

voltage drop across A-B = 1.553 , current in A-B=0.039

Req = VA-B / IA-B = 1.553/0.039 = 39.82 ohm

or

Req = (R1//R2) + R3 +(R4//R5) = 39.4 ohm . more precise theoritical value.

current across R3 is

I3 will be same as total current passing through A-B

so I3 = V/Req = 1.553/39.4 = 0.039426A

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