Process Control and Instrumentation
A magnetic flowmeter is

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

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Process Control and Instrumentation
Suppose that the gain, time constant and dead time of a process with the following transfer function:Gc(s) = 10 exp( - 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as

12, 0.4, 0.08
8, 0.6, 0.08
8, 0.6, 0.12
12, 0.6, 0.12

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