Ex

  Physics (NTSE/Olympiad)  

1. Electricity

Electrical Power

Electrical Power : The rate of loss of energy in an electrical circuit is called electrical power. It is denoted by'P'
p = = I2 R = IV =
units of power = joule/sec, watt, horse power
1 watt = 1 joule/sec, 1 HP = 746 watt
unit of electrical energy = watt second, kilowatt hour
1 kilowatt hour (kwh) = 3.6 x 106 Joule

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