I am having a doubt in a question on differential amplifier that I have posted as an Image. I was able to solve for the output voltage correctly but my main doubt is
input voltage(2 mv) ≠ drop across 20 kΩ resistor+ drop across 43 kΩ resistor (why not equal ?)
Hi all,
I am having a doubt in a question on differential amplifier that I have posted as an Image. I was able to solve for the output voltage correctly but my main doubt is
input voltage(2 mv) ≠ drop across 20 kΩ resistor+ drop across 43 kΩ resistor (why not equal ?) View attachment 110620
I could not understand. Why is there no need of the voltages to be equal? would that not be a violation of Kirchhoff's voltage law?
I am really sorry. This is the first time I am studying amplifiers(1st year engg) and some concepts may be new to me. Please explain a little bit.