Question with my circuit in multisim dealing with op-amp

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SUMMARY

The discussion centers on troubleshooting a circuit designed in Multisim involving an operational amplifier (op-amp) powered by ±10V supplies. The user initially faced issues with the output voltage (Vc) being incorrectly measured at 10VDC and later at 3V when a 100M resistor was used. Key mistakes identified include incorrect connections of the potentiometer and power supply pins for the op-amp, which were not connected properly. After adjustments, the user observed minimal changes in Vc despite altering the R4 resistor, indicating further issues in the circuit configuration.

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Electronics students, circuit designers, and hobbyists working with op-amps and simulation software like Multisim who need guidance on circuit troubleshooting and assembly.

ee1215
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I am drawing a circuit but not getting right result. I am to assemble the circuit below using +-10V supplies with all those specifications I have put in. I leave Node A open and adjust R4 to make Vc=0V. When I measure Vc originally it is about 10VDC(on the DVM). If I use a 100M resistor it only makes it about 3V. What is wrong with my circuit(the second link)?

Constructing:
http://i812.photobucket.com/albums/zz41/uofmx12/E21ckt.jpg

My circuit:
http://i812.photobucket.com/albums/zz41/uofmx12/E21ckt_2-1.jpg
 
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V2 is upside down. You are supposed to have one end of the potentiometer be at +10 V, but you connected the + end of the +10 V supply supply to ground.

Also, you have not connected anything to what I presume are the power supply pins for the amplifier symbol.
 
MisterX said:
V2 is upside down. You are supposed to have one end of the potentiometer be at +10 V, but you connected the + end of the +10 V supply supply to ground.

Also, you have not connected anything to what I presume are the power supply pins for the amplifier symbol.

Ok, so I changed the V2 supply. And I am getting about 88mV DC without the +-10 supply to the op amp and about 75mV DC with them connected. But for some reason when I change R4 resistor the the Vc voltage does not change from either 75mV or 88mV no matter what I change the resistor to. So I imagine something is still wrong.
 
I figured it out
 

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