ज्ब किसी मानक तंतु लैम्प को \(200\,V\) वाली मुख्य प्रत्यावर्तीं धारा \(( ac )\) स्रोत से जोड़ा जाता है तो यह \(100\,W\) का उपमोग करता है। बल्ब में प्रवाहित धारा का शिखर मान होगा \(...........\,A\)

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.