Quick question: how do you solve an ideal op amp circuit with the two terminals connected to independant power sources?
Does this only works if one input is connected to the ground and the other is connected to the outputAlways - the opamp will do its best to keep the two inputs ar same voltage.
When you're just beginning, write Kirchoff's Voltage Law from one input to the other and set to zero
starting at +, walking around to - and equating to zero;
3v - Vo - 1v = 0
Vo = 2
sanity check - does Vo lie between the power supply rails? If not something is wrong.
that should get you started. Soon you'll be like Yungman - read them as easy as resistor color codes.
You might look for the old books we used in 70's -
Don Lancaster's books (opamp cookbook?)
National Semioconductor catalog and AN 31
and Texas Instruments "OpAmps for Everyone" which you should download from TI.com and print and bind to pass on to your grandkids.
If the + input at ground and the output connect to -input. If the opamp want to do whatever it takes to bring the differential voltage to 0V, what do you think the voltage would be.Does this only works if one input is connected to the ground and the other is connected to the output