To measure the internal resistance of a battery, potentiometer is used. For R=10 Ω, the balance point is observed at l=500 ~cm and for R=1 Ω the balance point is observed at l=400 ~cm. The internal resistance of the battery is approximately:

Current Electricity: JEE Main 2024 Physics question

JEE Main 2024 · 4 Apr, Morning shift · Q6505

JEE Main 20244 Apr, Morning shiftPhysicsHardCurrent Electricity150× since 2002

To measure the internal resistance of a battery, potentiometer is used. For

R=10 \Omega

, the balance point is observed at

l=500 \mathrm{~cm}

and for

\mathrm{R}=1 \Omega

the balance point is observed at

l=400 \mathrm{~cm}

. The internal resistance of the battery is approximately :

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