To his surprise, the electric current flows through a conductor ________________________ (就好像液体一样).
举一反三
- Electric current flows through a conductor (导体) as though it _____ a fluid (流体). A: be B: is C: were D: was
- The magnentic field is generated by A: voltage applied to the conductor B: current through the conductor C: charge shifts D: permanent magnet
- 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
- 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.
- 1. What creates a magnetic field? More than one answer may be correct. A: a stationary object with electric charge B: a stationary conductor carrying electric current C: a difference in electric potential D: a charged capacitor disconnected from a battery and at rest