What is an electrode (with pictures) gas oil ratio for leaf blower


An electrode is a conductor that passes an electrical current from one medium to another, usually from a power source to a device or material. It can take a number of different forms, including a wire, a plate, or a rod, and is most commonly made a gas has no volume of metal, such as copper, silver, lead, or zinc, but can also be made of a non-metallic substance that conducts electricity, such as graphite. Electrodes are used in welding, electroplating ortega y gasset, batteries, medicine, and in industry for processes involving electrolysis. Anodes and Cathodes

In the case of a direct (DC) current, electrodes come in pairs, and are known as anodes and cathodes. For a battery, or other DC source, the cathode is defined as the electrode from which the current leaves, and the anode as the point where it returns. For reasons that are historical rather than scientific, electricity in a circuit is, by convention, depicted as traveling from positive to negative, so that it is seen as a flow of positive charge q gastrobar leblon out from the cathode, and into the anode. An electrical current, however, consists of a flow of tiny negatively charged particles called electrons, so this flow is actually in the opposite direction electricity journal. In this context, it is probably better to think simply in terms of positive and negative terminals.

Inside a battery, or electrochemical cell, the electrodes are made of different materials, one of which gives up electrons more easily than the other. They are kept in contact with a conducting chemical that can split electricity merit badge pamphlet into positively and negatively charged ions. When a circuit is completed, in other words, when the battery is connected to an electrical device, such as a light bulb, a redox reaction takes place within the cell. This means that the conducting chemical gains electrons at one electrode — a process known as reduction — and loses them at the other — a process called oxidation — with the result that the electrons flow as a current round the circuit. Reduction always takes place at the cathode, and oxidation at the anode r gasquet tennis.

In a rechargeable battery, this process is reversed while the battery is charging. An electrical current from another source is used to power a redox reaction in the opposite direction, which means that the anode becomes the cathode and vice-versa. It is still the case electricity deregulation wikipedia that reduction takes place at the cathode and oxidation at the anode, but the direction of the current is reversed, so which electrode is negative and which is positive depends on whether the battery is supplying current or recharging. Sometimes cells are connected together by an electrode, which acts as the anode for one cell and the cathode for the other. This is known as a bipolar grade 9 electricity test electrode.

To obtain a given element, an ionic compound of that element can be electrolyzed. An example is the production of sodium metal from molten salt, or sodium chloride. When the current flows, positively charged sodium ions are attracted to the negative electrode, or cathode, where they gain electrons, forming sodium metal. Negatively charged chloride ions are attracted to the z gas el salvador precios anode, where they lose electrons, forming chlorine gas, which is also collected gas efficient cars 2015 as a by-product. Electroplating

In this process, a metal object is coated with another metal to improve its corrosion resistance or appearance. The object to be coated forms the cathode in an electrolysis process by being immersed in a solution of a soluble compound of the metal that will form the coating, with the anode also made of this metal. When the current flows, positive metal ions from the solution are attracted to the cathode, and form a deposit on it. As the ions in solution are used up, they are replaced by ions that form from the anode. Sometimes electricity merit badge requirements, the anode is made from a different material that is not used up; in this method, the metal ions have to be replaced by topping up the solution. Other Uses

Electrodes are used in arc welding, a technique for joining two pieces of metal using electricity word search puzzle a large electric current. A consumable electrode melts, and provides the material that joins the metals. The non-consumable type is made from a material with a very high melting point, such as tungsten, and simply provides the heat to melt another material that forms the join. In medicine, electrodes may be used thermal electricity how it works in an emergency to apply an electric current to the heart in a technique known as defibrillation. They are also used to record electrical activity in the brain during an electroencephalogram (EEG).