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Posted: Wed Jan 31, 2007 4:09 am    Post subject: control system

1. for making an unstable system stable 
(a) gain of the system should be incerases 
(b) gain of the system should be decerases 
(c) the number of zero to the loop transfer should be increases 
(d) the number of poles to the loop transfer should be increases 
2.non minimum phase transfer function is defined as the transfer function 
(a) which has zeros in right half S plane 
(b) which has zeros only in left half S plane 
(c) which has poles in right half S plane 
(d) which has poles in left half S plane 
3.An advantage of memory interlacing is that 
(a) a large memory is obtaind 
(b) effective speed of the memory is increased 
(c) the cost of the memory is reduced 
(d) in an voltatile memory is obtained 
4.Feed back control system are basically 
(a) lowpass filters 
(b) high pass filters 
(c) band pass filters 
(d) band stop filters


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