In a minimum phase system

**Answer: **B

For stability poles must be in left half plane. Zeros in left half plane lead to minimum phase shift.

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If any term in the first column of a Routh array becomes zero, then

**Answer: **B

No answer description available for this question

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**Assertion (A):** Integration in time domain is converted into division in *s* domain

**Reason (R):**

**Answer: **B

No answer description available for this question.

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The log magnitude curve for a constant gain K is a

**Answer: **B

The factor K in the numerator of G(*j*ω) gives is straight line at 20 log10 K in Bode plot.

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**Assertion (A):** When the phase margin of a control system is improved using a lead network, noise transmission increases.

**Reason (R):** Phase lead compensation increases bandwidth.

**Answer: **A

More bandwidth means more noise.

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From the noise point of view, bandwidth should

**Answer: **B

If noise is to be eliminated, bandwidth cannot be large.

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The maximum shift which can be provided by a lead compensator with transfer function is

**Answer: **B

The maximum phase lead is given by

In this case a = 1/3. Hence sin Φ*m* = = 0.5 or Φ*m* = 30°.

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Which of the following features is not associated with Nichols chart?

**Answer: **D

No answer description available for this question.

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Assertion (A): If minimum phase system has a gain margin of 8 dB and phase margin of 21°, the system is stable.

Reason (R): For a minimum phase system both GM and PM must be positive for the system to be stable.

**Answer: **A

No answer description available for this question.

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In a second order system, the time constant t of exponential envelopes depends

**Answer: **C

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