A first order system with a proportional controller in the negative feedback loop has an offset to step input. This offset can be eliminated by
A
adding a derivative mode to the controller
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B
adding an integral mode to the controller
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C
decreasing the magnitude of the gain of the proportional controller
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D
adding a delay in the controller loop
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Solution
The correct option is B adding an integral mode to the controller Adding an integral mode to a controller removes the offset present in the response of the process.