Lead-acid batteries have a number of advantages over other types of batteries, including low cost, high capacity, and good performance at high temperatures. The electrolyte is usually sulfuric acid diluted with water. The majority of car batteries are lead-acid batteries, which use lead dioxide at the positive electrode and pure lead at the negative electrode. This charging process reverses the chemical reaction that occurs when the battery discharges. When the engine is running, the alternator charges the battery, causing electrons to flow from the anode to the cathode through an external circuit. Each cell has two electrodes, a positive electrode (the anode) and a negative electrode (the cathode), separated by an electrolyte. Most car batteries are made up of six cells connected in series. The average car battery has a voltage of 12 volts and a capacity of about 60 Ah. Its main purpose is to start the engine, but it also provides power for the lights and other accessories. Car Battery is AC Or DCĪ fully charged car battery is a lead-acid battery that supplies electrical current to a car. The higher the voltage of the battery (the potential difference betweenthe + and – terminals), the greater the amount of current that will flow for agiven level of resistance. If there is more resistance in the circuit, then less current willflow. The amount of current that flows through a circuit is determined by the resistance ofthe circuit. The direction of current flow depends on the polarity of the battery: if the + and – terminals are reversed, then the current willflow in the opposite direction. This potential difference causes current to flow through the circuit. When a battery is connected to an external circuit, it creates a potential difference between its terminals. The positive terminal is where electrons flow into the battery, and the negative terminal is where electrons flow out. Batteries can be used to store and convert electricity from one form to another.īatteries come in many different shapes and sizes, but all have the same basic principle of operation.Ī battery has two terminals, a positive (+) and a negative (-). Most people think that batteries are either AC or DC, but in fact they can be both. This flow of electrons creates an electric current that can be used to power electrical devices. During this reaction, electrons are transferred between the positive and negative electrodes within the battery. This process is known as electrochemical reaction. Lead-acid batteries are often used in cars and other vehicles, while NiCd and Li-ion batteries are commonly used in portable electronics such as laptops and cell phones.ĭC batteries work by converting chemical energy into electrical energy. Some of the most common types include lead-acid, nickel-cadmium (NiCd), and lithium-ion (Li-ion) batteries. These batteries can be used in a wide variety of applications, from powering small electronic devices to providing backup power for large systems.ĭC batteries come in a variety of sizes and shapes, depending on their intended use. There are many different types of batteries, but DC batteries are some of the most common. However, most household batteries (like AA or AAA) generate DC current. The answer is both! Batteries can generate either AC or DC current, depending on their design. This flow of electrons is what we call electric current. These electrons flow from the negative terminal to the positive terminal when the circuit is complete. Inside the battery, there are chemical reactions taking place that generate electrons. The positive terminal is usually marked with a + sign, while the negative terminal is usually marked with a – sign. Most batteries have two terminals, positive and negative. They allow us to store energy and use it later, which has made all sorts of portable devices possible. Batteries are one of the most important inventions in human history.
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