NEET 2026 (Phase 1) · PhysicsBridge symmetryPrevious Year Question
A uniform metallic wire of resistance 4 $\Omega$ is bent to form a square loop ABCD. A resistance of 2 $\Omega$ is connected between B and D, and a battery of 2 V across A and C. The value of current i is:
- A.2 A✓
- B.8 A
- C.4.5 A
- D.4 A
Correct Answer
(A) 2 A
Solution & Explanation
\textbf{Answer:} (1) 2 A \textbf{Solution:} Each side = 4/4 = 1 $\Omega$. Paths A–B–C and A–D–C are each 2 $\Omega$; arms equal $\Rightarrow$ balanced bridge, no current in the 2 $\Omega$ (B–D). R_AC = 2 $\Omega$ $\parallel$ 2 $\Omega$ = 1 $\Omega$. i = 2/1 = 2 A.
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