Electric current flows through a conductor (导体) as though it _____ a fluid (流体).
A: be
B: is
C: were
D: was
A: be
B: is
C: were
D: was
举一反三
- To his surprise, the electric current flows through a conductor ________________________ (就好像液体一样).
- The magnentic field is generated by A: voltage applied to the conductor B: current through the conductor C: charge shifts D: permanent magnet
- ( ) is an electric discharge brought on by the ionization of a fluid/air surrounding a conductor。 A: Corona discharge B: Skin effect C: Ferranti effect D: Phase angle
- Which of the following statements about a conductor in the static case is not true导体在静电平衡下表述不正确的是 A: The conductor must be at the same electric potential B: The surface of the conductor is an equi-potential surface等势面 C: There can be an electric field within the conductor导体内 D: There can be no net charge within the conductor体内无净电荷
- What creates a magnetic field? More than one answer may be correct. ( ) A: a stationary object with electric charge B: a charged capacitor disconnected from a battery and at rest C: a stationary conductor carrying electric current D: a difference in electric potential