Control Systems
The angle condition used for checking whether any point lies on root locus or not is...........

 ± (2q) 180o.
 ± (2q + 1) 360o.
 ± (2q) 360o.
 ± (2q + 1) 180o.

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Control Systems
Find the conditions for the system to be stable?

 Gain margin is negative but phase margin is positive
 Gain margin is positive but phase margin is negative
 Gain margin and phase margins are negative
 Gain margin and phase margins are positive

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