ANSWER 8.

The operation of an alternator and a generator both rely upon passing a stator or armature through magnetic fields the main difference is that a generator uses permanent magnets to supply the magnetic field where the alternator uses electromagnets to supply the magnetic field.
One advantage of a generator over an alternator is that a generator will supply generated current even when connected to a fully drained battery but an alternator in the same situation will not as it needs the field wire to be energised.

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