A horizontal power line carries a current of 3910 A from south to north. Earth's magnetic field (45.8 µT) is directed toward the north and is inclined downward at 64.0° to the horizontal. Find the (a) magnitude and (b) direction of the magnetic force on 150 m of the line due to Earth's field. (a) Number i (b) Units

Q: An infinitely-long conducting wire carries a current I. If the magnetic field a perpendicular…

A: solution as

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.