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5. Define power and give its unit.

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Definition of Power Power is defined as the rate at which work is done or energy is transferred or converted. It measures how quickly energy is transferred or converted from one form to another. Unit of Power The unit of power is the watt (W), named after the Scottish engineer James Watt. Watt (W):...
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Definition of Power

Power is defined as the rate at which work is done or energy is transferred or converted. It measures how quickly energy is transferred or converted from one form to another.

Unit of Power

The unit of power is the watt (W), named after the Scottish engineer James Watt.

  • Watt (W): The watt is defined as one joule per second. It is equivalent to the power required to do work at the rate of one joule per second.

Other units of power include:

  • Kilowatt (kW): Equal to 1000 watts. It is commonly used for larger electrical appliances and industrial machinery.
  • Megawatt (MW): Equal to one million watts. Used to measure the power output of large-scale power plants and industrial facilities.
  • Horsepower (hp): A unit of power originally defined as the power required to lift 550 pounds by one foot in one second. It is still commonly used to measure the power of engines, especially in the automotive industry. One horsepower is approximately equal to 746 watts.
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