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The open loop transfer function of a system is G(s)H(s) = the root locus wil intersect the imaginary axis at
  • a)
    ±j 2
  • b)
    ±j√2
  • c)
    ±j√10
  • d)
    ±j√102
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The open loop transfer function of a system is G(s)H(s) = the root...
CE = s3 + 2s2 + s(2 + k) + 4k = 0
For finding critically damping frequency,
s1 row should be zero
4 – 2 k = 0
k = 2
For finding the interaction with imaginary axis is
2s2 + 4k = 0
Put s = jω , 2(jω)2 + 4k = 0
2 ω2 = 4 × 2
ω = 2 rad/sec.
Free Test
Community Answer
The open loop transfer function of a system is G(s)H(s) = the root...
CE = s3 + 2s2 + s(2 + k) + 4k = 0
For finding critically damping frequency,
s1 row should be zero
4 – 2 k = 0
k = 2
For finding the interaction with imaginary axis is
2s2 + 4k = 0
Put s = jω , 2(jω)2 + 4k = 0
2 ω2 = 4 × 2
ω = 2 rad/sec.
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The open loop transfer function of a system is G(s)H(s) = the root locus wil intersect the imaginary axis ata)±j 2b)±j√2c)±j√10d)±j√102Correct answer is option 'A'. Can you explain this answer?
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