Magnetic field formula: The Formula for the

The Formula for the magnetic field in SI is B = µ (H+M) and in CGS is B = H+4π M. A wire carrying a DC current or permanent magnet produces magnetostatic (Stationery) field and its magnitude and direction remain same. Learn magnetic field definition, formulas , units, and laws for Physics 2025. Clear concepts with examples, diagrams, and practice questions for exams. Magnetic Field = Force × [Charge × Velocity] -1. Or, B = [M 1 L 1 T -2] × [I 1 T 1] -1 × [L T -1] -1 = [M 1 L 0 T -2 I -1]. Therefore, Magnetic Field is dimensionally represented as [M1 T-2 I-1]. Put your understanding of this concept to test by answering a few MCQs. Click ‘Start Quiz’ to begin! Since both strength and direction of a magnetic field may vary with location, it is described mathematically by a function assigning a vector to each point of space, called a vector field (more precisely, a pseudovector field).