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When discussing magnetism or magnetic systems, Do you apply an H-field? or apply a B-field?

I suppose this is in the general situation where you apply a magnetic field to a material.

In relation to B-H loop showing hysteresis, I notice that the "x-axis", typically dependent variable, is H and "y-axis", typically independent variable, is B... does this mean that you apply H and observe B?

If you apply an H-field, why do http://www.magnet.fsu.edu/mediacenter/factsheets/records.html" say the "record magnetic field produced is 100 Tesla" where Tesla is the unit for B?

So if i say i have an "external magnetic field" is it in units of Tesla? or Ampere/meter?

So if i say i have an "applied magnetic field" is it in units of Tesla? or Ampere/meter?

in other words, do you apply Teslas or A/m's?

I suppose this is in the general situation where you apply a magnetic field to a material.

In relation to B-H loop showing hysteresis, I notice that the "x-axis", typically dependent variable, is H and "y-axis", typically independent variable, is B... does this mean that you apply H and observe B?

If you apply an H-field, why do http://www.magnet.fsu.edu/mediacenter/factsheets/records.html" say the "record magnetic field produced is 100 Tesla" where Tesla is the unit for B?

So if i say i have an "external magnetic field" is it in units of Tesla? or Ampere/meter?

So if i say i have an "applied magnetic field" is it in units of Tesla? or Ampere/meter?

in other words, do you apply Teslas or A/m's?

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