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What is the equivalent of 90 kW
ninety thousand
A classmate's watt hour meter is marked with "3600 RPM" on the nameplate. Let a desk lamp of his home work normally for 12 minutes, and then the turntable of the watt hour meter turns around
The rated power of table lamp is 18 rpm?
1 hour = 60 minutes,
3600 rpm is the load power of 1kW, 3600 RPM per hour
The number of revolutions of table lamp working for one hour: 60 △ 12 × 18 = 90 revolutions
1000÷（3600÷90）=25w
The rated power of table lamp is 25W
How to calculate how many joules of electric energy is consumed when the electric energy meter turns around
When 600 revs / kW. H, how to calculate the electric energy consumed by the watt hour meter in one revolution
When 600 revs / kW. H, the watt hour meter turns once: 1 / 600 kW. H
1 joule = 1 watt × 1 second = 1 watt second, 1 kilowatt hour = 1 kilowatt × 1 hour = 1000 Watt × 3600 second = 3600000 watt second = 3600000 Joule
So the watt hour meter turns once: 1 / 600 × 3600000 = 6000 joules
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