Question 46
Electrical Energy and PowerIn the diagram above (Fig. 8), X and Y are resistance 4 Ω and 6 Ω respectively. If power dissipation in X is 10 W, then power dissipation in Y is
- A.2.4 W
- B.4.0 W
- C.6.0 W
- D.6.7 W
- E.15.0 W
Show the answer and explanation
Answer: D (6.7 W)
Explanation
X and Y are in parallel, so they have the same voltage and P = V²/R. PY = 10 × 4/6 ≈ 6.7 W.