Dear Members,
I have attached the image of inverting operational amplifier. I have the following doubts
For measuring current input current Iin we take voltage drop across Ri as
Vin  Va
Similarly voltage drop across Rf as Va  Vout for the current If
My question is why not we take as Va  Vin, for the first case and
Vout  Va for the second case
The current flows from left to right in this diagram. Please help revered members
I have attached the image of inverting operational amplifier. I have the following doubts
For measuring current input current Iin we take voltage drop across Ri as
Vin  Va
Similarly voltage drop across Rf as Va  Vout for the current If
My question is why not we take as Va  Vin, for the first case and
Vout  Va for the second case
The current flows from left to right in this diagram. Please help revered members
Attachments

279.3 KB Views: 55