Unformatted text preview: magnetic field can be mapped out. The current producing the magnetic field will be varied sinusoidally in time so that the induction technique indicates amplitude and direction of the magnetic field at various points in space. The frequency of the sinusoidal current will be set low so the magnetic field mapped will be essentially the same as the field produced by a coil carrying a steady current, which produces a steady magnetic field. In a coil of wire, as in all other shapes of wire with current, the magnetic field at any position is equal to the sum of contributions from the many short elementsof wire composing the entire length of the wire. For a coil, the contributions of the short elements add together to produce a greater field within the coil, along its axis, based on symmetry. The field in the central region is strong and uniform...
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This note was uploaded on 09/23/2008 for the course PHYS 0095 taught by Professor Budick during the Spring '07 term at NYU.
- Spring '07