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

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

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Automation System
Relay ladder logic is used in a PC because:

most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
it is impossible to write a control program for a machine in any other logic
it is the best industrial control language ever developed.
None of these
All of these

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