Please help Circuit analysis (Thevenin voltage and internal resistance)

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SUMMARY

This discussion focuses on circuit analysis, specifically the calculation of internal resistance (RI) and Thevenin voltage (VTH). The user seeks to prove that RI is equal to (RS)(RP)/(RS-RP) and has measured the Thevenin voltage (VTH) to be 0.790V with a Thevenin resistance (RTH) of 1,500 Ohms. The user is advised to utilize circuit analysis techniques, including the reduction of resistances and the application of source transformation to find VTH.

PREREQUISITES
  • Understanding of Thevenin's theorem
  • Familiarity with circuit analysis techniques, including series and parallel resistance calculations
  • Knowledge of open circuit and short circuit conditions
  • Basic proficiency in using multimeters for voltage measurement
NEXT STEPS
  • Study Thevenin's theorem in detail, focusing on practical applications
  • Learn advanced circuit analysis techniques, such as mesh and nodal analysis
  • Explore the concept of source transformation in circuit analysis
  • Practice measuring circuit parameters using a multimeter for accuracy
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Electrical engineering students, circuit designers, and anyone involved in practical circuit analysis and measurement techniques.

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URGENT! Please help! Circuit analysis (Thevenin voltage and internal resistance)

Hi guys,
I am really stuck on this portion of my lab and it's due tomorrow! Please help!

I have two questions:
The first deals with the diagram from the left of the attached picture. I have to prove that RI (internal resistance of the meter movement) is equal to (RS)(RP)/(RS-RP). I tried reducing the circuit through circuit analysis (Rs = R1+R2+... and 1/Rp=(1/R1)+(1/R2)+...) but it doesn't work. Please give me some pointers, thank you.

The second question is about the circuit on the right. I have to find the Thevenin voltage for this circuit. I know this is equal to the open circuit voltage which I measured to be 0.790V in the lab. I found the Thevenin resistance to be RTH=1,500 Ohms by circuit analysis. Please give me some ideas on how to solve for VTH, thank you!
 

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Don't know what the circuit looks like, but the procedure for finding the look in resistance is to turn off all your sources. Open circuit your current sources and short circuit your voltage sources.

You can solve for the Thevenin voltage by finding the short circuit current at the load terminals.
 

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