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PhysicsNEET 2020Kirchhoff's rules, Wheatstone bridge, potentiometer

Current Electricity

A resistance wire connected in the left gap of a metre bridge balances a10Ωa 10 \Omega resistance in the right gap at a point which divides the bridge wire in the ratio 3 : 2. If the length of the resistance wire is 1.5 m, then the length of 1Ω1 \Omega of the resistance wire is:

  1. A.1.0×10−21.0 \times 10^{-2} m
  2. B.1.0×10−11.0 \times 10^{-1} m✓
  3. C.1.5×10−11.5 \times 10^{-1} m
  4. D.1.5×10−21.5 \times 10^{-2} m

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