Automation System
How is the integral mode implemented using analog methods?

Op amp and an RC network to place the error voltage across the capacitor
All of these
Op amp and a capacitor
None of these
Op amp and resistors

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Automation System
Programmable controllers:

are programmed using relay ladder logic
None of these
cannot perform functions other than relay logic
(a) and (c) above
are widely used in many different industries

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