n experiment 6, the output of second op-amp is square wave, what are the possibilities of errors?a.Feedback resistance is not connected in the op-amp.b.Feedback resistance is connected, but the inputs wires are touching each other.c.Both a and b are correctd.Both a and b are incorrect

The output of an operational amplifier (op-amp) can be a square wave due to several reasons. Here are the possibilities of errors:

a. Feedback resistance is not connected in the op-amp: This could be a possible error. The feedback resistance in an op-amp circuit plays a crucial role in determining the gain of the amplifier. If it is not connected, the op-amp could go into saturation and produce a square wave output.

b. Feedback resistance is connected, but the input wires are touching each other: This could also be a possible error. If the input wires are touching each other, it could create a short circuit. This would distort the input signal, possibly resulting in a square wave output.

c. Both a and b are correct: This is a possible answer. Both the scenarios described in options a and b could lead to a square wave output from the op-amp.

d. Both a and b are incorrect: This is not a likely answer. As explained above, both the scenarios in options a and b could potentially lead to a square wave output from the op-amp. Therefore, it is unlikely that both are incorrect.