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PhysicsJEE Main 28 Jan 2026, Shift 1·Q3·MCQ·Moderate

Current Electricity · Cells and circuits

In the potentiometer, when the cell in the secondary circuit is shunted with 4 Ω4\ \Omega resistance, the balance is obtained at the length 120 cm of wire. Now when the same cell is shunted with 12 Ω12\ \Omega resistance, the balance is shifted to a length of 180 cm. The internal resistance of cell is Ω\Omega.
  1. (1)3
  2. (2)4
  3. (3)12
  4. (4)6
We corrected a printing error in the original paper

Source printed “the same cell in shunted”.

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