Answer: Helen is trying to increase the current through an electric generator.
Step-by-step explanation:
Electric generator is a device that converts mechanical energy to electrical energy.
The main functions of the armature are: To generate an electromotive force and to create a shaft torque in a rotating machine. By changing the number coils around an armature, the electric current can be increased or decreased.
In the given problem, Helen adjusts the armature of an electric generator by increasing the number of coils around the iron core. She is trying to increase the current through an electric generator.