Question

Standard cell of 1.2 V is balanced at the length of 2.40 m in potentiometer. Find out the balancing length for the potential difference across 3.5 Ω resistance where 0.2 A current is flowing through it, also find out potential gradient.
[x = 0.5V/m, l = 1.40 m]

Answer 1

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The current in the primary circuit of a potentiometer is

. The specific resistance and cross-section of the potentiometer wire are

ohm meter and