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

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

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Automation System
A flip-flop:

None of these
remembers what was previously stored in it
is a combinational logic device
is a sequential logic device
(a) and (c)

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Automation System
The program execution time:

None of these
must be slower than the fastest mechanical operation that is to be controlled
cannot be changed once the program is written
All of these
will vary depending on the language used

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