Question

4) A household uses the following electric appliances (i) Refrigerator of rating 400 W for 20 hours each day. (ii) Two electric fans of rating 80 W each for twelve hours each day. (iii) Six electric tubes of rating 18 W each for 6 hours each day. (iii) two electric AC of rating 800 W each for 3 hours each day​

Answer 1

Explanation:

i) Energy consumed by refrigerator for 20 hrs each day,

P x t= 400W*20= 800Wh

ii)

E=2*P*t=

2*80*12= 1920

iii)

E=6*18*6

= 648

iv)

E=2*800*3

=4800