Q&A on electric power law popularization

1.√2.√3.× (the symbol of resistance is R, and U is the symbol of voltage)

4.√5.× (it is 1.5 square millimeters)

6.√7.√8.√9.× (Carbon and mercury are not conductors) 10.√

11.× (Use special insulating tape for electricity) 12. √

13. The electricity utilization rate is high)

15.√

That’s detailed enough, O(∩_∩)O~