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Control Systems

Control Systems
Given a unity feedback system with G(s) = k/s(s+4), the value of k for damping ratio of 0.5 is

 64
 1
 16
 4

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Control Systems
If the magnitude of G(jω)H(jω) at phase crossover frequency is 0.5. Find the gain margin of the given system?

 4
 2
 0.5
 1

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Control Systems
For the polynomial , number of roots which lie in the right half of s-plane is

 1
 4
 3
 2

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Control Systems
The device necessarily used for automatic temperature control in a furnace is

 Any of above.
 Thermocouple.
 Auto-transformer.
 Thermostat.

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Control Systems
The transfer function of a linear time invariant system is given as G(s) = 10/(s² + 10s + 10). The steady state value of the output of the system for step input applied at time instant t=2 sec will be

 undefined
 0
 infinity
 1

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Control Systems
When compared to a 1st order LPF, a 2nd order LPF has

 faster drop in filter response.
 higher voltage gain.
 lower voltage gain.
 higher cut off frequency.

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