Exercise 2: An infinite solenoid composed by N turns and contains many couches as given in the following figure. The internal radius of the solenoid is R1 and its external radius is R2. By applying the Amperes' law, and if you know that the current in each turn is I and that the external magnetic field is equal to zero: R2 M 1) Determine the magnetic field at a point M internal to the solenoid (r < R1), with r represents the distance of the point M from the axis. What you conclude?

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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.