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Is it possible to conduct electricity without wires?

Is it possible to conduct electricity without wires?Wireless electric power transfer is theoretically possible and it’s in the R&D phase of many leading research labs in the world. Nasa hopes to power its Mars Rover wirelessly in future missions. The basic technology is simple: rectify the received microwave signal using a microwave low-pass filter and a diode. This structure is called rectenna (rectifier + antenna). Many Radio Frequency Identification (RFID) systems work on wirelessly transferred electric power. But to power your mobile system wirelessly, considerable power needs to be discharged which can be hazardous.

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