is it possible for two electromagnets to interact each other, ie. repulsive or attractive forces to be exerted to each other, without being exerted to other metallic items or other electromagnetic devices close by? Similar to bluetooth that pairs two devices without other being possible to interfere, but not for electromagnetic signals, but for electromagnetic forces induced.
closed as unclear what you're asking by John Rennie, ACuriousMind♦, CuriousOne, user36790, honeste_vivere May 23 '16 at 20:47
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Firstly, Bluetooth devices do in fact interfere with one another, just that the interference is not significant, and the communication protocols of the devices make it seem like they don't (i.e. my moving of my BT mouse does not move the cursor on your screen which is paired to your BT mouse)
You can isolate the system by putting the two electromagnets inside what is called a "Faraday's Cage" so that their main interaction is with each other. Anything outside the cage won't be able to "see" them.