Material can be magnetic, ferromagnetic, or non-magnetic. Consider the four cubes shown below labeled 1 through 4. Three of the faces of each cube are labeled A, B, and C. The four identical looking cubes are tested for various interactions: surface 2B attracts surface 4A surface 1A attracts surface 4C surface 3C does not interact with 1A   Determine if each of the cubes is a magnet, a ferromagnet or non-magnetic. Explain. If you cannot determine which class a cube belongs to, explain why you cannot.

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Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.