This document discusses magnetostatic fields and laws governing magnetic fields produced by electric currents, including Biot-Savart's law stating that the magnetic field produced by a current element is proportional to the current and inversely proportional to the distance from the element. It also covers Ampere's circuit law relating magnetic fields to their sources, applications of this law to infinite line and sheet currents, magnetic flux density as defined by Maxwell's equations, and magnetic forces.

1. MAGNETOSTATIC FIELDS

2. Analogy between Electric and Magnetic fields

3. Biot-Savart’s Law
• Biot-Savart’s law states that the magnetic field intensity dH produced at
a point P, by the differential current element Idl is proportional to the
product Idl and the sine of the angle α between the element and the line
joining P to the element and is inversely proportional to the square of the
distance R between P and the element.

4. Direction convention

5. Current distributions

6. Ampere’s circuit law – Maxwell’s equation

7. Applications of Ampere’s law – infinite line
current

8. Applications of Ampere’s law – infinite sheet of
current

9. Applications of Ampere’s law – infinite sheet of
current

10. Magnetic Flux Density – Maxwell’s Equation

11. Magnetic Flux Density – Maxwell’s Equation

12. Magnetic Flux Density – Maxwell’s Equation

13. Magnetic Forces

14. Magnetic Forces

15. Magnetic Forces

16. Magnetic Forces

17. Magnetic Forces