NEET 2024 · PhysicsWheatstone bridgePrevious Year Question
Choose the correct circuit which can achieve the bridge balance. (Arms 100 , 10 , 15 , 5 with galvanometer G and cell E + key K.)
Answer: (D) clean diamond: G on one diagonal, cell+key on the other. \textbf{Answer:} (4) \textbf{Solution:} For balance the galvanometer must sit on one diagonal and the cell+key on the other, with the four arms (100, 10, 15, 5 ) on the four sides.
- A.diamond, G & cell mis-paired on same side
- B.distorted (offset sub-diamond holds G & 5 )
- C.diamond, G/cell diagonals mis-paired
- D.clean diamond: G on one diagonal, cell+key on the other✓
Correct Answer
(D) clean diamond: G on one diagonal, cell+key on the other
Solution & Explanation
\textbf{Answer:} (4) \textbf{Solution:} For balance the galvanometer must sit on one diagonal and the cell+key on the other, with the four arms (100, 10, 15, 5 ) on the four sides. Only option (4) has this proper diamond with G and the battery on opposite diagonals, so a null (balance) can be achieved.
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