1. The problem statement, all variables and given/known data What is the output voltage for an op amp whose non-inverting input is connected to ground and its inverting-input voltage is 4mv? Assume that the op-amp open-loop gain is 2*10^5 and its supply voltage is Vcc=10V 2. Relevant equations Vo= A(vp-vn) 3. The attempt at a solution The problem gives Vn= 4mv A=2*10^5 Vcc=10V Since it says the non-inverting input is connected to ground, does that mean vp=0? Vo=2*10^5(0-.004V) Vo=-800 V However the answer is suppose to be -10V. What am I doing wrong? Thanks for helping!