Question

Two heaters A and B have power rating of I kW and 2 kW, respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is:

(1) 1:1

(2) 2:9

(3) 1:2

(4) 2:3

Answer 1

Correct option is (2) 2:9

Two heaters A and B have power rating of I kW and 2 kW, respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is 2:9.