Automation System
A solenoid:

is related to an aneroid
None of these
can be used only in de circuits
is spring operated
is widely used in industrial automation

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Automation System
What is the difference between integral and derivative control?

derivative control does not eliminate offset error
integral control has slower response to an error signal.
All of these
derivative control responds to a change in the rate of change in the error signal
None of these

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