Question

2. Define I watt of power
3. Find the energy in kWh consumed in 10 hours by four devices of power 500 W each
4. An electric heater is rated 1500 W How much energy does it use in 10 hours​

Answer 1

Answer:

According to the EIA, in 2017, the average annual electricity consumption for a U.S. residential home customer was 10,399 kilowatt hours (kWh), an average of 867 kWh per month. That means the average household electricity consumption kWh per day is 28.9 kWh (867 kWh / 30 days).

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Answer 2

Answer:

1) answer

defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer.

2) Total power p = 500w × 4 = 2000w. Time, t = 10h Energy = p × t. = 2000w × 10h = 2kwh × 10h = 20kwh. ∴ Energy = 20kwh