Process Control and Instrumentation
The closed loop pole of a stable second order system could be

Both real and negative
Complex conjugate with positive real parts
One real positive and the other real negative
Both real and positive

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Process Control and Instrumentation
A magnetic flowmeter is

Based on the linear relationship between the fluid flow rate and the induced voltage
Capable of measuring the flow rate of slurries and electrolytes
Based on the principle of Faraday's law
All of these

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