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Current Electricity — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
MCQ
In potentiometer a balance point is obtained, when:
  • A
    The $e.m.f.$ of the battery becomes equal to the $e.m.f.$ of the experimental cell.
  • ✓
    The $p.d.$ of the wire between the $+ve$ end of battery to jockey becomes equal to the $e.m.f.$ of the experimental cell.
  • C
    The $p.d.$ of the wire between $+ve$ point of cell and jockey becomes equal to the $e.m.f.$ of the battery.
  • D
    The $p.d.$ across the potentiometer wire becomes equal to the $e.m.f.$ of the battery.
✓

Answer

Correct option: B.
The $p.d.$ of the wire between the $+ve$ end of battery to jockey becomes equal to the $e.m.f.$ of the experimental cell.

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