Gauss’ Law for Magnetism
Recall from Part I, Gauss’ Law for Electricity:
??closed area E ? dA = 4pkQenclosed .
This looked like a hard way to solve for E (since E is inside the integral), but using symmetry it sometimes turns out easy.
For magnetism, we cannot separate poles, therefore we cannot enclose any poles. This means that we have: ??closed area B ? dA = 0.