यहाँ दर्शाये गये परिपथ में, बिन्दु \('C'\) को बिन्दु \('A'\) से तब तक जोड़े रखा जाता है जब तक कि परिपथ में प्रवाहित धारा स्थिर न हो जाए। तत्पश्चात्, अचानक, बिन्दु \('C'\) को बिन्दु \('A^{\prime}\) से हटाकर बिन्दु \('B'\) से \(t=0\) समय पर जोड़ दिया जाता है। \(t=L / R\) पर प्रतिरोध एवं प्रेरकत्व पर वोल्टता अनुपात होगा:

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.