Steady electric current, ______ by the Italian physicist Allessandro Volta (1745-1827), can be produced by the electric cell.
举一反三
- The ______cell can convert the energy of sunlight into electric energy.
- electric current
- The boundary condition of the electric field intensity of steady electric fields is A: the normal components are continuous. B: the tangential component are continuous. C: if there is no current at the interface, the tangential components are continuous. D: both the tangential and normal components are continuous.
- The Biot-Savart Law is used to（ ） A: determine the magnetic field created by an electric current B: determine the electric field created by an electric current C: determine the force field created by an electric current D: determine the magnetic field created by individual point charges E: determine the electric field created by individual point charges
- The inductance of an electric device is independent of the electric current it carries. A: 正确 B: 错误