Correct Answer - Option 1 : N/Wb
Magnetic pole strength:
- It is a measure of the force exerted by one face of a magnet on a face of another magnet when both magnets are represented by equal and opposite poles.
- Symbol: m.
Units:
- There are two possible units for magnetic pole strength in SI units, depending on how the pole force is described.
- If you describe this as force per unit field B, then the SI unit is the ampere-meter (Am).
- It can also be defined as the force per field of unit H, in this case, the unit SI is the weber (Wb).
- Unit of magnetic pole strength is Am or Wb.
Magnetic field intensity (H):
- Magnetic field strength refers to the ratio of the MMF which is required to create a certain Flux Density (B) within a certain material per unit length of that material. Some experts also call is as the magnetic field intensity.
- Furthermore, the magnetic flux refers to the total number of magnetic field lines that penetrate an area. Furthermore, the magnetic flux density tends to diminish with increasing distance from a straight current-carrying wire or a straight line which connects a pair of magnetic poles around which the magnetic field is stable.
- Magnetic field strength refers to a physical quantity that is used as one of the basic measures of the intensity of the magnetic field. The unit of magnetic field strength happens to be ampere per meter or A/m.
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B = μ H
B in terms of force is expressed according to Lorentz force equation as
B = \(\frac{F}{{qv\;sin\theta }}\)
Where F is force in newtons (N)
q is charge
v is velocity.
Therefore H = N / Am
H = N / Wb.
