A velocity selector is a device that uses both an electric and magnetic field to allow only particles moving at a specific speed through it. Parti- cles that move too fast will be forced to hit one wall of the selector while particles that move too slow will hit the other. Particles moving at the correct speed will travel through with a constant velocity. A particular velocity selector has a magnetic field B= 40μT pointing in the z direction (out of the page), and an electric field E= 1.2 N/C pointing in the x direction (to the right of the page). Charged particles are sent the negative y direction (down on the page) into the velocity selector. What speed particle does this selector allow through?

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Q: A velocity selector in a mass spectrometer, like the one shown below, uses a 0.126 T magnetic field.

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Q: A sketch below shows a mass spectrometer, that consists of a velocity selector and a deflection…

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Q: The Electromagnetic Pump. Magnetic forces acting on conducting fluids provide a convenient means of…

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Q: Figure P19.14a is a diagram of a device called a velocity selector,in which particles of a specific…

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Q: A charged particle moves through a velocity selector at constant velocity. The velocity selector is…

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Q: The image is a schematic of a velocity selector and a mass spectrometer. The electric field is…

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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.