SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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flag blowing in the wind
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ball rolling on the ground
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picture hanging on the wall
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all of the above
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Detailed explanation-1: -Here you can find the meaning of Which of the following systems is stable? a)y(t) = log(x(t))b)y(t) = sin(x(t))c)y(t) = exp(x(t))d)y(t) = tx(t) + 1Correct answer is option ‘B’.
Detailed explanation-2: -Stability Criterion – Passive networks are said to be stable only when all the poles lie in the left half of the s-plane. Active networks (containing controlled sources) are not always stable. Consider transformed active network shown in Fig. 14.13.
Detailed explanation-3: -These natural responses decay to zero as time approaches infinity. Thus, if the closed-loop system poles are in the left half of the plane and hence have a negative real part, the system is stable. That is, stable systems have closed-loop transfer functions with poles only in the left half-plane.