If there is no charge inside the Gaussian surface, the field [img=14x24]180356c02c2f797.png[/img] on the surface must be zero everywhere.
举一反三
- A point charge q is placed inside a cavity within a conductor. The conductor is electrically neutral and is isolated . The total charge on the outer surface of the conductor must be ______.
- There is no magnetic field in an ideal conductor, but there is a magnetic field inside because of the surface current。
- On the surface of a perfect conductor, the normal component of the electric displacement vector is A: continuous with the normal component of the electric displacement vector inside the conductor B: uncertain C: equal to the surface density of free charge on the conductor surface. D: equal to zero
- 5.On the ideal conductor surface, the relationship between the electric field line and the conductor surface is ( ) A: Vertical B: Parallel C: is zero D: not sure
- What is the name of the solid surface in the figure below?[img=360x664]1803bb9e6fc6d99.jpg[/img] A: circular cone surface B: Cone-shaped surface C: Cylindrical surface D: Columnar surface