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Current Electricity — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
MCQ
In a meter bridge experiment null point is obtained at I cm from the left end. If the meter bridge wire is replaced by a wire of same material but twice the area of across-section, then the null point is obtained at a distance
  • A
    $2 l cm$ from left end
  • ✓
    $1 cm$ from left end
  • C
    $\frac{l}{2} cm$ from left end
  • D
    $\frac{l}{4} cm$ from left end
✓

Answer

Correct option: B.
$1 cm$ from left end
(b) : Balance point is independent of area of cross-section, so it is at $l cm$ from left.

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