Question 1 : Assertion (A): All the systems which exhibit overshoot in transient response will also exhibit resonance peak in frequency response.
Reason (R): Large resonance peak in frequency response corresponds to a large overshoot in transient response.
1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true and R is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true
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Question 2 : The constant N loci represented by the equation x^{^}2+x+y^{^}2=0 is for the value of phase angle equal to:
1. -45°
2. 0°
3. 45°
4. 90°
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Question 3 : If the gain of the open loop system is doubled, the gain of the system is :
1. Not affected
2. Doubled
3. Halved
4. One fourth of the original value
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Question 4 : Constant N-loci:
1. Constant gain and constant phase shift loci of the closed-loop system.
2. Plot of loop gain with the variation in frequency
3. Circles of constant gain for the closed loop transfer function
4. Circles of constant phase shift for the closed loop transfer function
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Question 5 : Which one of the following methods can determine the closed loop system resonance frequency operation?
1. Root locus method
2. Nyquist method
3. Bode plot
4. M and N circle
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Question 6 : Given a unity feedback control system with G (s) = K/s(s+4), the value of K for which the damping ratio is 0.5.
1. 1
2. 16
3. 64
4. 32
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Question 7 : Statement 1: In constant M circles, as M increases from 1 to 8 radius of circle increases from 0 to 8 and Centre shifts from (-1,0) to (-8,0)
Statement 2: The circle intersects real axis at point (-1/2, 0)
1. Statement 1 is TRUE, 2 is FALSE
2. Statement 1 is FALSE, 2 is TRUE
3. Statement 1 & 2 TRUE
4. Statement 1 & 2 FALSE
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Question 8 : OLTF contains one zero in right half of s-plane then
1. Open loop system is unstable
2. Close loop system is unstable
3. Close loop system is unstable for higher gain
4. Close loop system is stable
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Question 9 : The transfer function of a system is given by Y(s)/X(s) = e^−0.1s/1+s. If x(t) is 0.5sint, then the phase angle between the output and the input will be:
1. -39.27°
2. -45°
3. -50.73°
4. -90°
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Question 10 : A system has poles at 0.01 Hz, 1 Hz and 80Hz, zeroes at 5Hz, 100Hz and 200Hz. The approximate phase of the system response at 20 Hz is :
1. -90°
2. 0°
3. 90°
4. -180°
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