What electrical appliances use alternating current

What electrical appliances use alternating current

TV, refrigerator, air conditioner, microwave oven. Too much

The copper wire is normally in the shape of a copper wire______ When it is connected with electrical appliances, switches and power supply to form a path, the______ The direction of the directional movement is the same as that of the current______ ．

① Copper wire is usually neutral. ② metal conduction depends on free electrons, which are negative charges. Therefore, the direction of free electrons in the wire is opposite to that of current

The zero line of the meter does not go. Will the meter turn when the power is 220 V
The zero line of three-phase four wire electronic meter doesn't go. Will the meter go when using 220 V or only using 380 V
Is it slow or fast

No zero line is still accurate measurement, basically no error. This is my practical experience, because of the need of work, I have done the test myself. And now I use it in many places