A jet passenger airplane is traveling at a constant altitude of 8,000 m. At that given altitude, the magnetic field of the earth points vertically upward and has a magnitude of 20 μT (perpendicular to the wing). A potential difference of 0.15 volts exists across the wing.  What is the speed of the airplane? Assume that the length of the airplane wing is 35 m.   a. 214 m/s   b. 365 m/s   c. 422 m/s   d. 333 m/s   e. 270 m/s

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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.