ENB205 Lecture Notes - Electric Field, Flux Linkage, Computer Engineering
Document Summary
For a wire: at a distance r away. Magnetic field is defined in terms of magnetic flux density (b), which loosely translates to how close the field lines are drawn. Always complete loops (no start or end like electric field lines) Always go from north to south poles. A measure of how easily something is magnetised. Air is 0 = 4 *10-7, everything else is measured relative to free space. The magnetic flux density (in a wire) created by the moving charge is proportional to the current in the wire. R =relative magnetic permeability r=radius from centre of wire. Magnetic flux density (in a coil) can be increased by coiling" conductors create a solenoid. Magnetic flux density (loop) applicable only at the centre of the loop, and only for a single loop or wire. Flux ( , wb wei-ber) if an imaginary surface is drawn, which the flux lines intersect perpendicular to, the total flux can be calculated.
