一道物理题（电场）求大神
21.Whichofthefollowingstatementsaboutsolidconductorsinelectrostaticsaretrue?I.Theelec...
21. Which of the following statements about solid conductors in electrostatics are true?
I. The electric field inside the conductor is always zero.
II. The electric potential inside the conductor is always zero.
III. Any net charge is on the surface.
A. I only B. II only C. III only D. I & III only E. II & III only 展开
I. The electric field inside the conductor is always zero.
II. The electric potential inside the conductor is always zero.
III. Any net charge is on the surface.
A. I only B. II only C. III only D. I & III only E. II & III only 展开
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