3
R1 = 12 , R2 = 18 , V = 120 V
Total resistance: 1/Rt = 1/R1 + 1/R2 = 1/12 + 1/18 = 5/36 - Rt = 36/5 = 7.2
Total power: P = V² / Rt = 120² / 7.2 = 2000 W
Added 37 days ago|1/29/2026 6:31:40 AM
This answer has been confirmed as correct and helpful.
3
For R1: P1 = V^2 / R1 = (120 V)^2 / 12 ohms = 14400 / 12 = 1200 W.
For R2: P2 = V^2 / R2 = (120 V)^2 / 18 ohms = 14400 / 18 = 800 W. Total power P_total = P1 + P2 = 1200 W + 800 W = 2000 W.
Both methods yield the same result. The total power dissipated is 2000 W.
Added 37 days ago|1/29/2026 6:32:04 AM
This answer has been confirmed as correct and helpful.
