The negative terminal of a car battery is connected to the chassis of the car. This connection provides a path for the current to flow from the battery to the various electrical components of the car, such as the starter motor, the ignition system, and the lights. If the negative terminal is not connected, the current cannot flow through these components, and the car will not be able to start or run.
In addition, the negative terminal of the car battery is also used to ground the electrical system of the car. This means that the negative terminal is connected to a metal part of the car that is in contact with the ground. This connection helps to protect the car's electrical system from damage caused by electrical surges or shorts.
Therefore, the negative terminal of a car battery is an essential part of the car's electrical system, and the car cannot run without it.
