(Electric force on charged particle) An electron is initially at rest right at the mid-point between two parallel charged plates. Suppose the separation of the plates is 5cm, and the uniform electron field between them has a strength of magnitude 100 N/C. Ignore the effect of gravitation and the edge effect of parallel plate electric field. Given that the mass of an electron is 9.11 × 10-31 kg. (a) Draw the electric field lines and state towards which plate will the electron move. (b) Calculate the electric force acting on the electron. (c) Calculate the time duration until the electron reaches one of the plates.

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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.