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

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

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Automation System
Light sensors:

never use infrared light as light source
come in a wide variety of mounting styles
None of these
cannot be used a s limit switches.
work in direct sunlight

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