brahma,
with negative feedback, the gain of the operational amplifier circuit will depend solely on the feedback gain and independent of the open-loop gain of the opamp.
I suggest that you take a look at this online material on operational amplifiers
Negative Feedback
h**p://hyperphysics.phy-astr.gsu.edu/hbase/electronic/opamp2.html#c1
Positive Feedback
h**p://hyperphysics.phy-astr.gsu.edu/hbase/electronic/posfe.html#c1
I hope that you find the material helpful.
Best regards,
v_c