Measurement and Instrumentation
A first order instrument is characterized by

 Static sensitivity, damping coefficient and natural frequency of oscillations
 Time constant only
 Static sensitivity and time constant
 Static sensitivity and damping coefficient

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Measurement and Instrumentation
It can be stated that

CT operates at almost the same flux density as a PT
No generalisation can be made with regard to the flux densities in CT and PT
CT operates with considerably lower flux density than a PT
CT operates with a higher flux density than PT

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