In a magnetic laboratory 37.200 tesla value of magnetic field is achieved. For achieve such magnetic field, (i). Calculate the value of required electric current at 2 ×10-2 m from the long wire (ii). Compute the value of required electric current at the center of coil made up of 100 turns with radius 42 ×10-2 m (iii). Determine the value of required electric current near the center of solenoid made up 4× 104 turns with radius 2.4×10-2 m and its length 32×10-2 m.

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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.