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• Posted on January 17th, 2020 in Electrical Engineering
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Electrical Engineering Notes On – Savart’s Law – For W.B.C.S. Examination.

Electrical engineering is a professional degree subject that deals with the study of electricity, electronics, and electromagnetism. Aspirants those who are from Electrical engineering background can only handle this optional subject. The syllabus of Electrical engineering for W.B.C.S. Mains exam is too vast and difficult. The syllabus of electrical engineering ought to be done before prelims.The Biot Savart Law is an equation describing the magnetic field generated by a constant electric current. It relates the magnetic field to the magnitude, direction, length, and proximity of the electric current. Biot–Savart law is consistent with both Ampere’s circuital law and Gauss’s theorem. The Biot Savart law is fundamental to magnetostatics, playing a role similar to that of Coulomb’s law in electrostatics.Continue Reading Electrical Engineering Notes On – Savart’s Law – For W.B.C.S. Examination.

Biot Savart law was created by two French physicists, Jean Baptiste Biot and Felix Savart derived the mathematical expression for magnetic flux density at a point due a nearby current carrying conductor, in 1820. Viewing the deflection of a magantic compass needle, these two scientists concluded that any current element projects a magnetic field into the space around it.

Through observations and calculations they had derived a mathematical expression, which shows, the magnetic flux density of which dB, is directly proportional to the length of the element dl, the current I, the sine of the angle and θ between direction of the current and the vector joining a given point of the field and the current element and is inversely proportional to the square of the distance of the given point from the current element, r.

This is Biot Savart law statement:

Where, k is a constant, depending upon the magnetic properties of the medium and system of the units employed. In SI system of unit,