Class 10 Physics Electricity Electric Power

Electric Power

Rate at which electric energy is dissipated or consumed in a circuit is called Electric Power.

P = VI = I2R = V2/R

  • SI unit of Power is Watt (W).
  • 1 Watt power is consumed when 1 Ampere of current flows through a device at a potential difference of 1 Volt.
  • Electrical energy is the amount of work done or energy consumed in a given amount of time. So, it is measured in Joules or Wh (watt hour) or most commonly as kWh (Kilowatt hour).
  • 1 kWh = 3.6 x 106 Joule (J)

 

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