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Aug 29, 2014 · I am trying to power my IP camera over a long distance from the power socket (about 10m). The included power adapter, rated for 5V 2A is about 1.5m long. I cut the cable and extended it using a thicker wire (to prevent voltage drop) but despite that the voltage drops to about 4.5V at the end.
Nov 9, 2009 · Developed in the 1830s and 1840s by Samuel Morse and other inventors, the telegraph revolutionized long-distance communication. It worked by transmitting electrical signals over a wire laid...
Electromagnetism is caused by the magnetic fields around wires carrying an electric current. The induced magnetic field of a wire can interact with other nearby magnets, producing a force.
Sep 22, 2016 · After 1980 other technologies, such as facsimile and electronic mail, took over the role of long distance record communications formerly supplied by the telegraph. In technological and scientific terms, the telegraph was important for three major reasons.
Determine the dependence of the magnetic field from a thin, straight wire based on the distance from it and the current flowing in the wire. Sketch the magnetic field created from a thin, straight wire by using the second right-hand rule.
Consider an infinitely long straight, uniformly charged wire. Let the linear charge density of this wire be λ. P is the point that is located at a perpendicular distance from the wire. The distance between point P and the wire is r. The wire is considered to be a cylindrical Gaussian surface.
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Consider an element ˆzdz on the wire at a height z above the xy -plane. (The length of this element is dz; the unit vector ˆz just indicates its direction.) Consider also a point P in the xy -plane at a distance ρ from the wire. The distance of P from the element dz is √ρ2 + z2.
