中国大学MOOC: If the electric flux through a closed surface is 0, then there is no net charge inside the surface.

If the electric flux through a closed surface is 0, then there is no net charge inside the surface. A: 正确 B: 错误

On the ideal conductor surface, the relationship between the electric field lines and the conductor surface is A: the electric field lines is always pertendicular to the conductor surface. B: the electric field lines is always parallel to the conductor surface. C: there is no electri field lines exsited. D: unable to determine the relationship.

If something ______<br/>a surface, it makes long stripes or marks on the surface. A: echoes B: clings C: strips D: pits

中国大学MOOC: In art, _________ means the last covering of paint, polish, etc. that is put onto the surface of something; the condition of the surface.

The electric potential inside a charged solid spherical conductor in equilibrium A: is always zero. B: is constant and equal to its value at the surface. C: decreases from its value at the surface to a value of zero at the center. D: increases from its value at the surface to a value at the center that is a multiple of the potential at the surface

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

Which of the following can make a cast shadow behave predictably? A: Various light sources. B: A flat surface C: A bumpy surface. D: A dark environment.

______ is covered with heavy snow. A: The surface of earth B: The earth’s surface C: The earths’ surface D: The surface

The gadget can be _____________ to any vertical surface.