举一反三
- Both electric field E and electric potential V can describe the characteristics of a field. If the electric potential at a certain point is zero, the electric field at that point has to be zero.
- BEV/EV (Battery Electric Vehicle/ Electric Vehicle):____
- Electric heaters have the electric energy _____________ (transform) into heart.
- This heater consumes _______________ that one does. A: electric power twice as great as B: greater twice electric powe C: twice as great electric power as D: twice greater electric powe
- 4-3。What is the working principle for LED？（ ） A: convert electric to light B: convert light to electric C: convert electric to heat
内容
- 0
(10分)This heater consumes _______________ that one does. A: greater twice electric power B: electric power twice as great as C: twice as great electric power as D: twice greater electric power
- 1
electric
- 2
The inductance of an electric device is independent of the electric current it carries. A: 正确 B: 错误
- 3
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
- 4
This interrelationship between magnetic and electric fields makes possible such things as the electromagnet and the electric motor.