Automation System
A flip-flop:

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

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Automation System
In raster-scan colour monitors, colour can be intensified by:

None of these
having each electron gun controlled by a composite signal
using an in-line gun arrangement with a solid metal mesh
having each electron gun controlled by separate signal
grouping the phosphor dots in a circular pattern

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