1. In a charging capacitor, which of the following phenomenon is considered in Ampere's law a. current density b. conduction current c. opposing change in current d. displacement current 2) Which of the following events result to a zero magnetic force? a whenever the charge is accelerating in the magnetic field b whenever the charge is decelerating in the magnetic field c The answer can be found on more than one of the choices. d when a charge is moving along the direction of the magnetic field 3) What should we do to a toroid for it to produce more magnetic field at the center of its cross-section? a Wind the wire to more turns b Do not change the number of turns, but decrease the radius of each turn c Lessen the turns of the wire. d Do not change the number of turns, but increase the radius of each turn

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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.