If a 1000 W heater is used for 3 hours, how much energy does it consume in kilow

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Question: If a 1000 W heater is used for 3 hours, how much energy does it consume in kilowatt-hours?

Options:

Correct Answer: 3 kWh

Solution:

Energy consumed in kilowatt-hours is calculated as E = P (kW) * t (h). Here, P = 1000 W = 1 kW and t = 3 hours. Thus, E = 1 kW * 3 h = 3 kWh.

If a 1000 W heater is used for 3 hours, how much energy does it consume in kilowatt-hours?

If a 1000 W heater is used for 3 hours, how much energy does it consume in kilowatt-hours?

Step 1: Understand that the heater's power is given in watts (W). We need to convert this to kilowatts (kW).
Step 2: Convert 1000 W to kilowatts. Since 1 kW = 1000 W, we divide 1000 W by 1000. This gives us 1 kW.
Step 3: Identify the time the heater is used, which is given as 3 hours.
Step 4: Use the formula for energy consumed: E = P (in kW) * t (in hours).
Step 5: Substitute the values into the formula: E = 1 kW * 3 hours.
Step 6: Calculate the energy consumed: E = 3 kWh.

Energy Consumption Calculation – Understanding how to calculate energy consumption using power and time.
Unit Conversion – Converting watts to kilowatts to use the correct units in calculations.