Final answer:
If the generator output has dropped, the current will flow through the generator armature in the opposite direction and the generator warning light would be on
Step-by-step explanation:
When the generator output has dropped, it means that the mechanical energy being converted into electrical energy is decreasing. This can happen if there is a decrease in the driving voltage or if there is a problem with the generator itself. In either case, if the generator output drops, the current will flow through the generator armature in the opposite direction. This is because the direction of current flow is determined by the magnetic field produced by the generator, and if the generator output has dropped, the magnetic field will also be reversed. As a result, the generator warning light would be on to indicate an issue with the generator.