The voltage regulator controls the current through which of the following?

The voltage regulator is a critical component in the charging system of a vehicle, primarily responsible for maintaining a consistent voltage level to the electrical system and preventing overcharging of the battery. It achieves this by controlling the current flow to various components of the alternator.

One of the primary roles of the voltage regulator is to manage the current in the alternator field, which is essential for generating the magnetic field necessary for the alternator to produce electricity. By regulating the field current, the voltage regulator ensures that the alternator generates the appropriate amount of voltage based on the electrical demands of the vehicle.

Additionally, the voltage regulator also influences the current through the alternator brushes. These brushes are part of the alternator's design and come into contact with the rotating rotor. By controlling the current to the rotor, the brushes can effectively channel the electricity generated by the alternator to the vehicle's electrical system.

Therefore, since the voltage regulator impacts current flow to the alternator brushes, the rotor, and the alternator field, it is correct to say that it controls current through all these components.