The magnetic force on a wire in the shape of a semicircle. In an xy plane, a 3m long wire bent in a semicircle is placed and a current of 2A is circulated in it in the direction indicated in the image. Determine the magnetic force which acts on the wire when it is immersed in a uniform magnetic field of 0.5T oriented: (a) in the positive direction of the z axis; (b) in the positive direction of the x axis.

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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.