The dial of an electric energy meter is marked with the words "1200R / kW · H", and an electric furnace is connected to the meter to work alone. 2. When the turntable of the electric energy meter turns 110 revolutions, how much electric energy does the electric appliance consume during this period? What is the resistance of the electric furnace when it works | Math enthusiast | Mathematical art

The dial of an electric energy meter is marked with the words "1200R / kW · H", and an electric furnace is connected to the meter to work alone. 2. When the turntable of the electric energy meter turns 110 revolutions, how much electric energy does the electric appliance consume during this period? What is the resistance of the electric furnace when it works

This is the common sense of life. The voltage is 220 V by default. You can't be wrong according to it

The watt hour meter is marked with 3000revs / kWh. When a single consumer is used, it takes 100 seconds for the turntable of the watt hour meter to rotate 5 times. The consumer consumes less power

"3000 cycles / kWh" means: consume 1 kilowatt hour of electricity, the meter turns 3000 cycles
1kwh=1000*3600=3600000J
Power consumption of 5 revolutions w = 5 / 3000 degree = (5 / 3000) * 3600000 = 6000J
P=W/T=6000/100=60w

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