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Why is there a positive and negative in car battery?

Car batteries have both a positive and negative terminal because they are electrochemical cells that produce electricity through chemical reactions. In order for a chemical reaction to occur, there must be a flow of electrons from one atom to another. The positive terminal of the battery is where electrons are released, while the negative terminal is where electrons are accepted.

When a circuit is connected between the positive and negative terminals of a battery, electrons flow from the positive terminal through the circuit to the negative terminal. This flow of electrons creates an electrical current, which can then be used to power various devices.

The reason why car batteries have two terminals is to allow for the flow of electrons in a controlled manner. If there were only one terminal, electrons would not be able to flow from one atom to another, and the battery would not be able to produce electricity.

The positive and negative terminals of a car battery are typically marked with a "+" and a "-" sign, respectively. It is important to connect the positive terminal of the battery to the positive terminal of the device that is being powered, and the negative terminal of the battery to the negative terminal of the device. If the terminals are connected incorrectly, the device will not work and may be damaged.

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