Current Electricity
Class 12 · Current Electricity

Meter Bridge

Slide jockey along 1m wire; X = R·ℓ/(100−ℓ) at balance.

Run simulation

Key Notes

01

Wheatstone bridge with one arm replaced by a uniform 1m resistance wire.

02

Slide jockey to find balance point at length ℓ → X = R·ℓ/(100−ℓ).

03

More precise than Wheatstone for similar values; uniform-wire ratio is the trick.

Formulas

Meter bridge

ℓ in cm.

Important Points

Best balance is around 40–60 cm — minimises % error.

Wire must be uniform; check by reversing X and R.

Meter Bridge notes from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 12 physics revision for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG.