physics notes

inductance

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LR circuits

voltage drop across an inductor:

ENM — DIPOLES:

Gauss’s Law Note that this is not actually a law, it’s just a corollary of Coulomb’s Law. Electric flux through a closed surface is equal to enclosed charge over .

• Electric field lines tell you where a positive test charge would go
• Dipole moment points from negative charge to positive charge
  • this makes sense, because the general principle is that we give priority to positive dudes and let negative dudes flip signs.