The magnetic field 40.0 cm away from a long, straight wirecarrying current 2.00 A is 1.00 µT. (a) At what distance is it0.100 µT? (b) At one instant, the two conductors in a longhousehold extension cord carry equal 2.00 - A currents inopposite directions. The two wires are 3.00 mm apart. Find themagnetic field 40.0 cm away from the middle of the straightcord, in the plane of the two wires. (c) At what distance is itone - tenth as large? (d) The center wire in a coaxial cable carriescurrent 2.00 A in one direction, and the sheath aroundit carries current 2.00 A in the opposite direction. What magneticfield does the cable create at points outside?

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A:

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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.