Constant wheelchair use will _____ almost any floor surface.
举一反三
- 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
- The gadget can be _____________ to any vertical surface.
- 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.