MP Board · Class 12 · Physics · Moving Charges and MagnetismState Ampere's circuital law.
Step-by-Step Solution
Ampere's circuital law states that the line integral of the magnetic field $\mathbf{B}$ around any closed loop is equal to $\mu_0$ times the total current $I$ enclosed by that loop. Mathematically, it is expressed as $\oint \mathbf{B} \cdot d\mathbf{l} = \mu_0 I$. This law is extremely useful for calculating the magnetic field produced by symmetric current distributions, serving a similar purpose to Gauss's law in electrostatics for calculating electric fields.
💡 Study Guide: This question tests core syllabus concepts from Moving Charges and Magnetism. For formulas, key summaries, and mock exam reference guides, read the full Moving Charges and Magnetism Revision Notes.