Automation System
A dc servo motor:

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

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Automation System
An encoder:

is used to send telegraph signals
converts an input to a binary number
None of these
converts a binary number to a decimal number.
can have only four keys

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Automation System
The program counter:

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

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