1Which is the dimensional formula of magnetic pole strength?
Magnetic pole strength works out to [L A].
MagnetismClass 12, Magnetism and Matter
Dimensional formula of Magnetic pole strength
[L A]
Taken here as magnetic moment per unit length, the NCERT convention. Some books use the weber convention instead, so check your textbook.
How to get the dimensional formula of magnetic pole strength
- Start from the definition: magnetic pole strength = magnetic moment / length.
- area = length × length, so area is [L] × [L] = [L2].
- magnetic moment = electric current × area, so magnetic moment is [A] × [L2] = [L2 A].
- Put in the dimension of each part: [L2 A] / [L].
- Add the powers of each base quantity: [L A].
Three questions on magnetic pole strength
2What is the SI unit of magnetic pole strength?
The SI unit of magnetic pole strength is the ampere metre (A m).
3Do magnetic pole strength and magnetic flux have the same dimensions?
Magnetic pole strength is [L A] but magnetic flux is [M L² T⁻² A⁻¹].
Magnetic pole strength: quick answers
What is the dimensional formula of magnetic pole strength?
The dimensional formula of magnetic pole strength is [L A]. It comes from magnetic pole strength = magnetic moment / length.
What is the SI unit of magnetic pole strength?
The SI unit of magnetic pole strength is the ampere metre (A m).
Is magnetic pole strength dimensionless?
No. Magnetic pole strength has the dimensions [L A].