Control Systems
Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is

 LC.
 RC.
 Any of the above.
 RL.

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

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

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