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

Practice Questions

Q1
If a 1000 W heater is used for 3 hours, how much energy does it consume in kilowatt-hours?
  1. 3 kWh
  2. 2 kWh
  3. 1 kWh
  4. 0.5 kWh

Questions & Step-by-Step Solutions

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.
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