- #1
desaila
- 25
- 0
This question is giving me problems.
Consider Gauss's law: (integral) E.dA = qenc/(perm. free space). Which is true?
A. If q = 0, then E = 0 everywhere on the surface.
If there is no enclosed charge, there is no flux.. so no electric field, correct?
B. On the surface, E is everywhere parallel to dA.
This is true, at least for spherical surfaces.
C. A charge outside the surface cannot affect E on the surface.
I don't think this is true. Why wouldn't it affect it?
D. E must be the electric field due to qenc.
Even with an enclosed charge, E inside the surface is still 0.
There is also a none of the above option.
Could multiple answers be correct? I think A and B are both true.
Consider Gauss's law: (integral) E.dA = qenc/(perm. free space). Which is true?
A. If q = 0, then E = 0 everywhere on the surface.
If there is no enclosed charge, there is no flux.. so no electric field, correct?
B. On the surface, E is everywhere parallel to dA.
This is true, at least for spherical surfaces.
C. A charge outside the surface cannot affect E on the surface.
I don't think this is true. Why wouldn't it affect it?
D. E must be the electric field due to qenc.
Even with an enclosed charge, E inside the surface is still 0.
There is also a none of the above option.
Could multiple answers be correct? I think A and B are both true.