Define triboelectric series and mention which type of electrification is used

The triboelectric series is a list of materials arranged according to their tendency to gain or lose electrons when brought into contact with another material. When two materials are rubbed together, the material that gains electrons becomes negatively charged, while the material that loses electrons becomes positively charged. This type of electrification is called triboelectrification. The triboelectric series is useful for understanding and predicting the behavior of static electricity. For example, if you rub a balloon on your hair, the balloon will become negatively charged and your hair will become positively charged. This is because hair is higher on the triboelectric series than balloons. Here is a simplified triboelectric series: * **Positive:** * Air * Glass * Wool * Human hair * Silk * Paper * Cotton * **Negative:** * Rubber * Plastic * Nylon * Metals Triboelectrification is a type of contact electrification, which means that it occurs when two materials come into contact. It is a very common phenomenon, and it can occur between any two materials, even if they are both the same type of material. Triboelectrification is used in a variety of applications, including: * **Electrophotography:** This is the process used in laser printers and photocopiers to transfer an image from a drum to a piece of paper. * **Air filtration:** Triboelectric air filters can be used to remove dust and other particles from the air. * **Powder coating:** Triboelectric charging can be used to apply a powder coating to a metal surface. * **Static electricity generators:** These devices use triboelectrification to generate a high voltage electric current. Triboelectrification can also be a nuisance. For example, it can cause static electricity to build up on your clothes, which can give you a shock when you touch something metal. It can also cause dust to stick to your screen, and it can make it difficult to dispense powders evenly.