Why is current-density a vector?
20341
Why does current density have a direction and not current?
156100
Toroid with variable current and Ampere's Law
43141
Why is the relationship between atomic number and density not linear?
27480
Continuity equation for charge and current densities of an accelerated point charge
82706
Why is the voltage across a capacitor and the current across an inductor continuous?
34935
How is resistance defined when there is no current?
19964
What does the dot product of two vectors represent?
38770
What exactly is a current source?
99477
Why doesn't current pass through a resistance if there is another path without resistance?
98193
Why are we able to use Components of Vectors?
43801
Why is $\operatorname{Div}\big(\operatorname{Curl} F\big) = 0$? Intuition?
7555
Why do we consider Lagrangian densities in field theory (as opposed to Lagrangians as in point mechanics)?
77989
What are the rules for complex-component vectors and why?
55992
Why is dipole the simplest source in electrodynamics?
15173
Why use vectors to describe velocity/force/etc instead of treating magnitude and direction as separate values?
2511
Displacement currents, aren't really currents?
53258
Why exactly does the time-reversal operator need to be anti-linear?