दो हीटर \(\mathrm{A}\) व \(\mathrm{B}\) की शक्ति दर क्रमशः \(1 \mathrm{~kW}\) तथा \(2 \mathrm{~kW}\) है। दोनों पहले श्रेणी क्रम में तथा फिर समान्तर क्रम में एक सिथर शक्ति स्रोत से जोड़े जाते हैं इइऩ दोनों स्थितियों में निर्गत शक्तियों का अनुपात है:

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.