Five minutes later, the dial of the watt hour meter turned 110R What is the actual revolution of the meter? It is marked as 220v5a50hz 2500r / kW. H

Five minutes later, the dial of the watt hour meter turned 110R What is the actual revolution of the meter? It is marked as 220v5a50hz 2500r / kW. H

2000r
Electric energy consumed by electrical appliances in 5 minutes: [220 V * 3A * (5 / 60) H] / 1000 = 0.055 kwh;
Let the actual constant of electric energy meter be X: 0.55kwh/110r = 1kwh / x, then x = 2000r

The electric energy meter is an instrument for measuring the electric energy consumption of electrical appliances. If Xiaohua wants to verify whether the ×× R / kWh marked on the dial of his electric energy meter is accurate, he will connect the electrical appliance marked with "220V & nbsp; 3A" into the circuit separately. When the electrical appliance works normally for 5min, the turntable of the electric energy meter just turns 110R, then the electric energy consumed by the electrical appliance is______ J. The actual revolutions per kilowatt hour of the meter shall be______ R．

(1) The consumed electric energy is: w = uit = 220V × 3a × 300s = 1.98 × 105J. Because 1kW · H = 3.6 × 106j, so 1.98 × 105J = 0.55kw · h. (2) because the electric energy consumed by the appliance is 0.55kw · h, the turntable of the electric energy meter just turns 110R; so when 1kW · h is consumed, the turntable turns 200R. So the answer is: (1) 1.98 × 105. (2) 200

Xiaohua will connect the electrical appliances marked with "220V 3A" into the circuit separately. When the electrical appliances are used to work normally for 5 minutes, the actual revolutions per kilowatt hour of the electric energy meter will be recorded

Do not know the watt hour meter, how many times per kilowatt hour ah..? Ask: Xiaohua will be marked with "220 V 3A" electrical appliances alone into the circuit, when the switch to electrical normal work for 5 minutes, the watt hour meter turns just 100 R, the actual number of revolutions per kilowatt hour