Operational Amplifiers - Technical MCQs

Q1:

In an open-loop op-amp circuit, whenever the inverting input (–) is negative relative to the noninverting input (+), the output will:

A swing negative

B close the loop

C be balanced

D swing positive

ANS:D - swing positive

1. If Non-inverting terminal Voltage is Greater than Inverting terminal voltage then the output will be positive or Swing positive.

2. If the Non-inverting terminal is less than the inverting terminal then the output will be negative or swing negative.

So, case 1 satisfy the given question so answer D is right.