The characteristics of five wires are given in the table. Wire Material Length Gauge A iron 2.0 m #22 copper 2.0 m #22 C copper 2.0 m #18 copper 1.0 m #18 E iron 2.0 m #18 The gauge is a measure of the diameter of the wire; and #18 corresponds to a diameter of 1.2 x 10-3 m; and #22 corresponds to a diameter of 6.4 x 10-4 m. The resistivity of iron is 9.7 x 10 82. m; and the value for copper is 1.72 x 10-8. m. Of the five wires, which one has the smallest resistance?

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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.