Why is the field inside a hollow sphere zero?
4707
Gravitational field intensity inside a hollow sphere
69764
Potential inside a polarized sphere
94500
Why is permeability of free space (in calculation of magnetic field) a non zero number?
12758
Magnets arranged in a sphere
26372
Is electric field inside a cavity necessarily zero?
1162
Why $\{\mathbf{0}\}$ has dimension zero?
85078
Why must a singularity form inside a black hole?
52621
Why is $\det(A - \lambda I)$ zero?
105423
Why doesn't every integral from 0 to $2\pi$ equal zero?
127450
How can the electric potential be zero at a point where the electric field isn't, if that field can give a test charge kinetic energy?
99154
Why is the covariant derivative of the metric tensor zero?
43801
Why is $\operatorname{Div}\big(\operatorname{Curl} F\big) = 0$? Intuition?
112179
Why don't the results of testing $H_0 : \beta = 0$ and $H_0 : {\rm cor}(X,Y)=0$ agree?
40683
What's wrong with the square root version of the Klein-Gordon equation?
71951
Is there no electric field inside a conductor?
121643
Why isn't the zero ring the field with one element?
146101
Floating in a Dyson Sphere