which of the following can be used as a rotating amplifier in a control system?1

Question

Which of the following can be used as a rotating amplifier in a control system?1. amplidyne2. separately excited dc generator3. synchro4. self excited dc generator

Options:

A . 3 and 4

B . 1 and 2

C . 1, 2 and 3

D . All

Answer: Option B

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