(adsbygoogle = window.adsbygoogle || []).push({}); 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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# Homework Help: Please help Circuit analysis (Thevenin voltage and internal resistance)

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