A velocity selector operates by using perpendicular electric and magnetic fields in the region of the selector. Particles with the selected velocity experience zero net force as they move through the region. The velocity is chosen by varying the strength of the electric field. Velocity selectors are often used in mass spectrometers. If a particular mass spectrometer uses a magnetic field strength of 0.100 T. a) What electric field strength is needed to select a speed of 4.0 × 106 m/s? b) What is the voltage between the plates if they are separated by 1.00 cm?

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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.