Question

please answer this urgently

Answer 1

Answer:

Electric energy is defined as amount of power done in unit time and electric power is defined as the amount of work done in unit time.

P=V^2/R

So,power is inversely proportional to resistance.Hence 40 W lamp is having higher electrical resistance as compared to 60 W lamp.

Commercial unit of electrical energy is Kilowatt hours (KWH).

1 KWH=3600000=3.6×10^6 J.