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

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

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Automation System
Semiconductor devices:

None of these
have a very short infant mortality period
All of these
usually have a very short MTBF (mean time between failure)
are less reliable than electro¬mechanical components

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

University of Aston, Birmingham, 1960
Massachusetts Institute of Technology in 1963
Imperial college of Science and Technology, London, 1973
None of these
Cranfield Institute of Technology, London, 1962

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Automation System
A flip-flop:

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

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