A uniform wire of resistance 12 \( \Omega \) is cut into three pieces in the ratio of length 1 : 2 : 3. Now the three pieces are connected to form a triangle. A cell of emf 8 V and internal resistance 5 \( \Omega \) is connected across the highest of the three resistors. The current through the circuit is:

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.