Charge, Coulomb's law, and the field concept
Is the field a bookkeeping device or a real thing?
MIT OCW
Lewin's E&M course, with the famous demonstrations.
Classical · Module 06
Faraday's great conceptual gift: stop thinking about action at a distance and start thinking about a condition of space itself. Everything after depends on taking the field seriously.
By the end of this module
You can compute fields from charge distributions and see why symmetry is the physicist's shortcut.
Is the field a bookkeeping device or a real thing?
MIT OCW
Lewin's E&M course, with the famous demonstrations.
How can I find a field without ever doing an integral?
Why is a scalar easier to work with than a vector, and what do I give up?
Why is the field inside a conductor always zero?
Check yourself
Every answer comes with the reasoning, not just a verdict. Getting one wrong and reading why is the point.
01Gauss's law lets you compute a field easily only when:
02The electric field inside a solid conductor in electrostatic equilibrium is zero because:
03Doubling the separation of a parallel-plate capacitor at fixed charge does what to the stored energy?