Automation System
The program counter:

contains the address of the next instruction to be executed
None of these
decides which program to run
is where arithmetic is done in a computer.
counts the number of instructions that have been executed

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Automation System
A dc servo motor:

uses a tachometer for speed feedback
All of these
can provide precise position control
None of these
uses a variable dc voltage for speed control

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

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

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