Name: Bob P.
How did the symbols E, B, H, and D come to be used to
represent what they do in Maxwell's equations? What's the history behind them?
I believe these are accidents of history. You may be able to find out some
background by thumbing through the 3 volumes of Richard Feynmann's "Lectures
on Physics". He tends to give little anecdotes about how things got to be
called what they are.
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Update: June 2012