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in a room and that all available power devices without connecting to the power supply may be a reality in the medium term. Researchers working on technology that, as happens with mobile phones or wireless Internet connections, can transport energy without wires.

portable devices like mobile phones, MP3 players and computers that do not require chargers or batteries to operate, as they could be recharged from a distance, are a dream can come true few years. To do this, scientists are working on technologies that open the door to energy management, using theories developed in the nineteenth and early twentieth century by Nicolas Tesla.

Based on the concepts developed by Tesla, a group of researchers the Massachusetts Institute of Technology (MIT) led by André Marin Soljacic Hurse and have some experiments to conduct electricity without wireless. One of the first experiments carried out has kept a lamp lit 60-watt to two meters from the nearest socket.

transport of electricity is done by creating a magnetic field between two sources built with copper coils, one connected to a power source and the other to the device. Thus, MRI is achieved by the two sources vibrate at the same frequency and energy exchange between them without affecting other devices or objects nearby.

The method is to induce electricity through a physical phenomenon known as resonance: All objects have a resonance frequency, and if two objects vibrate at the same frequency, the energy of vibration increases.

power transfer takes place within the space bounded by the coils, without it being dissipated out of this space. In addition, other objects located within the space between the coils with a different vibration frequency is not affected by magnetic resonance and the energy released. Soljacic and his group say that the power dissipation is less than other systems that use radio waves or laser. According to proponents, the system (for now) only lost 50% of the energy reversed. The inventors have named this technology "WiTricity" or "WiTricity" by the union of the English words "wireless" and "electricity."

many years remain on the market for devices that exploit this technology, but their applications may be implemented in many areas, both business, and industrial and household users. However, it still must consider the potential health effects, although in principle there is no indication of danger. The reason for their low hazard to health lies in contrast to microwave ovens that emit high-frequency power electromagnetically, that this technology emits low-frequency power, which are not harmful or affect people even though they are located within its range. However, like other technologies that work on low power, such as mobile phones, many previous studies are needed before final marketing.

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