Process Control and Instrumentation
A magnetic flowmeter is

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

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Process Control and Instrumentation
For a feed back control system to be stable, the

Roots of the characteristic equation should be real
Poles of the closed loop transfer function should lie in the right half of the complex plane
Bode plots of the corresponding open loop transfer function should monotoni-cally decrease
Poles of the closed loop transfer function should lie in the left half of the complex plane

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Process Control and Instrumentation
Time constant is the

Same as dead time
Time taken by the controlled variable to reach 63.2% of its full change
Same as transportation lag
Time required by the measured variable to reach 63.2% of its ultimate change

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