Question

(i) Define Power.
(ii) Derive a relation between 1 kilowatt hour and joule.

Pls answer fast i will give brainliest if u anwer good

Answer 1

Answer:

(i) Power : We can define power as the rate of doing work, it is the work done in unit time. The SI unit of power is Watt (W) which is joules per second (J/s)

(ii) 1 W =1 J/S

    1 W*S = 1 J ----> 1

     We know that,

      1 KILO WATT = 1000 W ==> 1 W = 10^-3 KILOWATT

      1 HOUR = 3600 SEC ==> 1 SEC = 1/3600 HOUR

       substitute these values in 1st equation

        (10^-3/3600 )KW * HOUR = 1 J

         1 kilowatt hour = 3.6 * 10^6 J = 3.6 Million Joules

HOPE IT IS HELPFUL