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This measurement comes up a lot in my E&M class, in regards to inductance and inductors.

Is there really no conventional term for this?

If not, is there some historical reason for this omission?

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Nope, not as far as I know. It's just "rate of change of current" or something like that.

I suppose it's possible someone has given it a name in some paper or textbook, but if so, it's not widely used.

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    $\begingroup$ And once you're on friendly terms, "I dot". $\endgroup$ – coneslayer Jan 6 '11 at 15:21
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It is change of current in unit time. If there is a current, there will be a magnetic field. If there is a change in current, the possibility is an acceleration of charge which leads to the production of electromagnetic waves. So it could be an electric field and/or magnetic field.

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