Question

in a house individual power of two elements are 100W and 150W
. Effective power of their series combination will be?​

Answer 1

P1=100

P2=150

Effective power of their series combination will be

1/P = 1/P1 + 1/P2

1/P = 1/100 + 1/150

1/P = 3+2/300

1/P = 5/300

P = 60 W