Q. How a symmetrical swing is obtained at the output of Op-amp?

A
Providing amplifier with negative supply voltage
B
Providing amplifier with positive voltage
C
Providing amplifier with positive& negative voltage
D
None of the mentioned
Solution:

For example, consider a single voltage supply +15v. During positive half cycle the output will be +5v and -10v during negative half cycle.
Therefore, the maximum peak to peak output swing, -5v (-10v) = -15v (Asymmetrical swing).
So, to get symmetrical swing both positive and negative supply voltage with bias point fixed suitably is required.

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