a. Suppose a wire carries a current of 2.00 A in a direction out of the page as shown in Figure 1. What is the magnitude of the magnetic field at a distande of 0.15 meters from the wire? The magnetic field forms circles about the wire. In the figure below sketch one of these circles taking care to show the direction of the magnetic field so that it may be discerned if the field circulates in the clockwise or counter- clockwise sense.

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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.