he connected the electric appliance marked with 220v3a into the circuit separately, and after the electric appliance worked normally for 5min, the electric energy meter turned round   He connected the electric appliance marked with 220v3a into the circuit separately. After the electric appliance worked normally for 5min, the rotary table of the electric energy meter turned 110R. What is the actual speed of the electric energy meter per kilowatt hour

  he connected the electric appliance marked with 220v3a into the circuit separately, and after the electric appliance worked normally for 5min, the electric energy meter turned round   He connected the electric appliance marked with 220v3a into the circuit separately. After the electric appliance worked normally for 5min, the rotary table of the electric energy meter turned 110R. What is the actual speed of the electric energy meter per kilowatt hour

The rated voltage of household appliances is 220V, the power is 4kw, the external connection is 380V, and three meters are used. Do the three meters rotate when the appliance works
If all three meters work, do they bear the same current

Only one of the meters can rotate, and the other two don't (only three meters can rotate when all three phases are used). The overload capacity of meters with the same rated current is the same

A household electric meter is marked with "3000r / kW. H". Now there is only one light bulb connected in the household circuit. It is measured that the aluminum disk rotates 150r in 3min. Using these data, we can calculate the electric energy consumed by the light bulb during this period?

Each kilowatt hour is 3000 round, 150 / 3000 = 0.05 kilowatt hour, 1kW * H = 3.6 * 10 ^ 6J, and the total is 180000 joules