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2. Magnetometer - Wikipedia

   en.wikipedia.org/wiki/Magnetometer

   A magnetometer is a device that measures magnetic field or magnetic dipole moment. Different types of magnetometers measure the direction, strength, or relative change of a magnetic field at a particular location. A compass is one such device, one that measures the direction of an ambient magnetic field, in this case, the Earth's magnetic field.

3. Hardware disease - Wikipedia

   en.wikipedia.org/wiki/Hardware_disease

   Hardware disease in livestock is traumatic puncture of the gastrointestinal tract with resultant spread of infection, caused by ingestion of a sharp, hard object, usually a piece of hardware (hence the name). These pieces of metal settle in the reticulum and can irritate or penetrate the lining. [1] It is most common in dairy cattle, but is ...

4. Glossary of rail transport terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_rail_transport...

   A reverse switch and auxiliary resistance are essential parts of the apparatus'under each car. The apparatus is applicable for cither direct current or alternating current motors. Also called Westinghouse electro-pneumatic system of control. Wheel 1. A circular frame or solid piece of wood or metal which revolves on an axis.

5. Electromagnetic coil - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_coil

   Electromagnetic coil. The magnetic field lines (green) of a current-carrying loop of wire pass through the center of the loop, concentrating the field there. An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil ( spiral or helix ). [1] [2] Electromagnetic coils are used in electrical engineering, in ...

6. Eddy current - Wikipedia

   en.wikipedia.org/wiki/Eddy_current

   A magnet induces circular electric currents in a metal sheet moving through its magnetic field. See the diagram at right. It shows a metal sheet (C) moving to the right with velocity v under a stationary magnet. The magnetic field (B, green arrows) of the magnet's north pole N passes down through the sheet.

7. Electromagnetic shielding - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_shielding

   Electromagnetic shielding is the process of lowering the electromagnetic field in an area by barricading it with conductive or magnetic material. Copper is used for radio frequency (RF) shielding because it absorbs radio and other electromagnetic waves. Properly designed and constructed RF shielding enclosures satisfy most RF shielding needs ...