Process Control and Instrumentation
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if

Kc is reduced
Derivative control action is introduced
Kc is increased
Integral control action is introduced

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Process Control and Instrumentation
A magnetic flowmeter is

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

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