Question

The negative feedback causes

(a) The voltage between the two input terminals to the very small, ideally zero

(b) The voltage between the two input resistance very high, ideally infinite

(c) Current flow through the positive input terminal and no current flows through the negative input terminal

(d) Both a and c

I got this question in examination.

Origin of the question is The Inverting Configuration topic in chapter Operational Amplifiers of Electronic Devices & Circuits

Answer 1

Right answer is (a) The voltage between the two input terminals to the very small, ideally zero

To explain I would say: Ideally the input terminals are at the same potential but in real practice there is a very small potential between the two terminals.