Two heaters A and B have power rating of 1 kW and 2kW, 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:

Question

Dr. Abubacker · Accepted Answer

[Solution by Claude - not from source] $R_A\propto\frac1{1000}$, $R_B\propto\frac1{2000}$. Parallel power $=3000$ W; series power $=\frac{V^2}{R_A+R_B}=\frac{2000}{3}$ W. Ratio $=\frac{2000/3}{3000}=2:9$. Answer (4).

Q. Two heaters A and B have power rating of 1 kW and 2kW, 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:

Explanation

Reviewed by Dr. Abubacker

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