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The given circuit shows a uniform straight wire AB of 40 cm length fixed at both ends. In order to get zero reading in the galvanometer G, the free end of J is to be placed from B at:

Asked in Re-NEET 2024 · Metre bridge

• (1) 32 cm
• (2) 8 cm
• (3) 16 cm
• (4) 24 cm

Step-by-step solution

Why the other options are wrong

• (1) No single slip gives 32 cm; the balance divides the 40 cm wire in the ratio 8 : 12, that is 16 cm and 24 cm.
• (2) No single slip gives 8 cm; it is the 8 Ω value read as a length.
• (3) This is the balance length measured from A, not from B.

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