A student makes a short electromagnet by winding 200 turns of wire around a wooden cylinder of diameter d = 6.0 cm. The coil is connected to a battery producing a current of 3.0 A in the wire. (a) What is the magnitude of the magnetic dipole moment of this device?     _________A · m2(b) At what axial distance z ≫ d will the magnetic field of this dipole have the magnitude 5.0 μT (approximately one-tenth that of Earth's magnetic field)?    _______________cm (please show units. It really helps me out)

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Q: A student makes a short electromagnet by winding 480 turns of wire around a wooden cylinder of…

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Q: uniform magnetic field

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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.