In your laboratory you have a sensitive piece of equipment which will not function if it is in the presence of a magnetic field of magnitude greater than B0 Teslas. In your laboratory there is also a long, fairly straight solid copper wire that carries a current of  I0 amps. Calculate the minimum distance (radius) from the center of the wire that the sensitive laboratory equipment can be located so that it will still function.

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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.