A. Transformer
B. Generator
C. Reactor
D. All of the above
Answer: B. Generator
Explanation:
The voltage of an AC generator is controlled by the electromechanical voltage regulator.
The magnetic field produced by the current attracts a moving ferrous core held back under spring tension.
The magnetic field produced by the current attracts a moving ferrous core held back under spring tension.
As voltage increases, so does the current, strengthening the magnetic field produced by the coil and pulling the core towards the field.
When voltage decreases, so do the current, releasing spring tension or the weight of the core and causing it to retract. This closes the switch and allows the power to flow once more.
The magnet is physically connected to a mechanical power switch, which opens as the magnet moves into the field.