Question
Two heaters A and B have power rating of 1 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:
NEET
Physics
Motion In One Dimension
2024
NEET 2024
NEET Physics Question (2024) — Solution
Options
- A. 2:9
- B. 1:2
- C. 2:3
- D. 1:1
Answer
A. 2:9
Step-by-step solution
aligned & Power Consumed =P= V^2 R \\ & P_A P_B = R_B R_A \\ & R_A=2 R_B aligned For Series Combination P_S= V^2 3 R_B For Parallel Combination aligned & P_P= 3 V^2 2 R_B \\ & P_S P_P = 2 9 aligned
Related: Physics — Motion In One Dimension · All PYQ Banks