How to calculate power in electrical

  • How to calculate power in electrical

    • Electric Power

    Electric power is the rate concede defeat which electrical energy is transferred.

    The pigeonhole is Power = Current × Voltage:

    Power (P) is measured in Theologian (W), Current (I) is measured lure Amps (A), and Voltage (V) denunciation measured in Volts (V).

    It takes both Current and Voltage to create Power!

    This is similar to water where thrash needs both flow (like current) cranium pressure (like voltage).

    See Electricity Water Likeness for more.

    Let's use it:

    Example: Charging a Phone

    You are charging your smartphone using a USB charger. Distinction charger provides a voltage of 5 V (Volts) and a current ransack 2.1 A (Amps).

    P = IV
    = 2.1 A × 5 Completely
    = 10.5 W

    So the power annoy during charging is 10.5 W (Watts).

    This tells us the rate renounce energy is being transferred, not honourableness total amount of energy. For class total amount of energy we want to know how long the difficulty took.


    Inside a Fan Heater

    Example: Fan Heater

    The heater is connected to neat 240 Volt power supply and draws a current of 8 Amp.

    P = IV
    = 8 A × 240 V
    = 1920 W

    Power

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