A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. E0 and a resistance r1. An unknown e.m.f. E is balanced at a length $l$ of the potentiometer wire. The e.m.f. E will be given by

Question

A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. E₀ and a resistance r₁. An unknown e.m.f. E is balanced at a length $l$ of the potentiometer wire. The e.m.f. E will be given by

${{{E_0}l} \over L}$

${{L{E_0}r} \over {\left( {r + {r_1}} \right)l}}$

${{L{E_0}r} \over {l{r_1}}}$

${{{E_0}r} \over {\left( {r + {r_1}} \right)}}.{l \over L}$

Solution

Please login to view the detailed solution steps...

Go to DASH