# The addition of open loop zero pulls the root-loci towards:

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The addition of open loop zero pulls the root-loci towards:
1. The left and therefore system becomes more stable
2. The right and therefore system becomes unstable
3. Imaginary axis and therefore system becomes marginally stable
4. The left and therefore system becomes unstable

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Correct Answer - Option 1 : The left and therefore system becomes more stable

Effect of addition of zeroes:

1. The system becomes more stable.
2. The angle of asymptotes increases and this root locus shift towards the left side of the s-plane slightly more
3. Relative stability improves
4. Range of K for stability increases.
5. The system becomes less oscillatory
6. Breakaway point shifts towards the left in s plane.
7. Damping factor increases.

Effect of addition of Poles:

1. Operating range of k decreases.
2. Relative stability reduces
3. The system becomes more oscillatory
4. Breakaway point shifts towards the imaginary axis
5. Damping factor decreases.

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