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Question Bank [ 2022 ] — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsQuestion Bank [ 2022 ]1 Mark
MCQ
When unknown resistance is determined by meter bridge, the error due to contact resistance is minimised by ______ 
  • A
    connecting both the resistances only in one gap
  • ✓
    interchanging the position of known and unknown resistances
  • C
    using uniform wire
  • D
    obtaining the null point near the ends of the wire
✓

Answer

Correct option: B.
interchanging the position of known and unknown resistances
When unknown resistance is determined by meter bridge, the error due to contact resistance is minimised by interchanging the position of known and unknown resistances.

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