The magnetic field `bar(dB)` due to a small current element `bar(dl)` at a distance `vec(r)` and carrying current `'I'` is

The magnetic field dvecB due to a small current element dvecl at a distance vecr and element carrying current i is,

The magnetic field (dB) due to a small element. (dl) at a distance (vecr) and element carrying current I is

The magnetic field due to a bar magnet _____

The magnetic field at the origin due to a current element I (vec dl ) placed at a positon (vec r) is

The magnetic field at the origin due to a current element I (vec dl ) placed at a positon (vec r) is

The magnetic field at the origin due to a current element I (vec dl ) placed at a positon (vec r) is

The magnetic field at the orgini due to a current element vec(idl) placed at a point with vector position vec(r) is

The magnetic field (d vecB) at a point due to an elemental conductor (d vecl) carrying a current (i) at a distance (vecr) from the elemetn, is given by