When Kirchhoff laws cease to be valid?
38281
Do all components obey Kirchhoff's Current Law?
24478
What is the name of this theorem, and are there any caveats?
144134
When is the ergodic hypothesis reasonable?
84036
When do relativistic effects need to be explicitly included?
122670
Explanation for $E~$ not falling off at $1/r^2$ for infinite line and sheet charges?
40211
Type of stationary point in Hamilton's principle
128250
How quickly is the desired state of curl of the Electric Field around a point achieved where a Magnetic Field Vector has just begun changing?
40334
Apparent violation of the law of conservation of angular momentum in the torques experienced by two interacting electric dipoles
155316
Are two waves out of phase only when the phase difference is $\pi$?
123418
Laws of addition of Vectors
83567
Is Biot-Savart Law valid for time-varying currents unlike Ampere's law?
16644
Why does cancellation of dots $\frac{\partial \dot{\mathbf{r}}_i}{\partial \dot{q}_j} = \frac{\partial \mathbf{r}_i}{\partial q_j}$ work?
1615
Do the laws of physics evolve?
66919
When/why does the principle of least action plus boundary conditions not uniquely specify a path?
134122
When is differentiating an equation valid?
81705
Does "Going Infinite" necessarily end the game?
151940
Cancellation law for direct sums