Which of the following statement is NOT correct about power?

CONCEPT:

• Power is defined as the rate of doing work.
• It is a scalar quantity that has only magnitude but no direction.
• The SI unit of power is Watt.
• There is another unit of power i.e. horsepower.
• 1 h.p. = 746 Watts or 0.75 kW.
• When work is done, an equal amount of energy is consumed.
• 1 Watt is the power of an appliance that consumes energy at the rate of 1 Joule per second.
  • 1 Watt = 1 Joule per second

EXPLANATION:

The power of an electrical appliance tells us the rate at which electrical energy is consumed or doing work by it. Its unit is Watt. It is a scalar quantity.

• There is another unit of power i.e. horsepower.
• 1 h.p. = 746 Watts or 0.75 kW.
•  1 horsepower is not equal to 746 kW. So statement 3 is incorrect.

So option 3 is correct.

• 'Watt' is named after the Scottish inventor, engineer, and designer James Watt who became famous for improving the design of the steam engine.