Electrical Energy

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  • Electrical Energy
    • Electrical Power
      • Power is measured in watts (W) or kilowatts (kW)
        • 1 Watt: Rate of energy transfer equal to 1 joule per second
        • 1 Kilowatt: 1000 Watts: 1000 joules per second
      • P = E/t
        • P - Power in watts
        • t - Time taken for the energy to be transferred in seconds
        • E - Energy transferred to the appliance in joules
    • Using Electrical Energy
      • The energy transferred to a 1 kW appliance in 1 hour is 1 kilowatt-hour (kWh)
      • E = P x t
        • P - Power in kilowatts
        • t - Time taken for energy to transfer in hours
        • E - Energy transferred in kWh

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