Physics · 2021
JEE Main · 25 July 2021, Shift 1 · Q11
In the given figure, there is a circuit of potentiometer of length AB =10 m. The resistance per unit length is 0.1 Ω per cm. Across AB, a battery of…
In the given figure, there is a circuit of potentiometer of length $\displaystyle \mathrm{AB}=10 \mathrm{~m}$. The resistance per unit length is $\displaystyle 0.1 \Omega$ per cm . Across AB , a battery of emf $\displaystyle E$ and internal resistance '$\displaystyle r$' is connected. The maximum value of emf measured by this potentiometer is :
Official answer
(3)
$\displaystyle 5$ V
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.