Question

In a house individual power of two elements are 100 W and 150 W Effective power of series combinaton
will be
(1) 120 W
(2) 75 W
(3) 50 W
(4) 60 W​

Answer 1

Answer:

P1 = 100 Watts

P2 = 150 Watts

As it is a series circuit, 1/P = 1/P1 + 1/P2 = 1/100 + 1/150

1/P = (3 + 2)/300 = 5 /300 = 1/60

Hence, P in series is equal to 60 Watts