Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance $R_{p} = 1Ω$ as shown in the figure. An external resistance of $R_{e} = 2Ω$ is connected via the sliding contact. The electric current in the circuit is :

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The circuit can be considered as ​ ∴ R eq ​ = 0.5 + 2 + 0.5 0.5 × 2 ​ = ( 10 5 ​ + 25 10 ​ ) Ω = 50 45 ​ = 10 9 ​ = 0.9 ∴ i = 0.9 0.9 ​ = 1 A ​

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