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Main concepts
Biot-Savart-Laplace law:
where The modulus of magnetic field intensity: a) the endless straight wire with a current I at a distance of r from the wire
b) the segment of straight wire with a current I at a distance of r ^ from the axis of a segment
where a1 and a2 – angles, which are created radius-vectors, traced from the ends of a conductor to the target point at which field is being calculated; c) at the centre of the current-carrying coil of the radius R with a current I
D) at the axis of the current-carrying coil
where а – is the distance from the centre of coil to the target point at the axis;
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