Physics
The image given below displays kilowatt-hour meter readings recorded at two distinct points in time.
Assuming a continuously running 2000 W air conditioner as the sole electrical device in use, calculate the time interval, in hours, between these two meter readings.
Household Circuits
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Answer
Given,
- Power rating of air conditioner (P) = 2000 W
- Initial meter reading = 856 KWh = 856 x 1000 Wh = 8,56,000 Wh
- Final meter reading = 1567 KWh = 1567 x 1000 Wh = 15,67,000 Wh
Now,
Total electrical energy consumed (E) = Final meter reading - Initial meter reading = 15,67,000 - 8,56,000 = 7,11,000 Wh
Then
Total time interval = = 355.5 hours
So, the air conditioner is running for 355.5 hours.
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