Practice question · Multiple choice
Why does magnetostatics introduce the auxiliary field ?
Hints
- Compare with the role of the displacement field in electrostatics.
- Bound currents are hard to track; free currents are what you supply.
Show the answer
D. Its curl counts only free current, so Ampère’s law stays usable in matter
Why
hides the bound magnetisation currents, so Ampère’s law can be applied with only the current you actually drive. Force on a moving charge is still .
Practise Magnetic Materials
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