Physics · 2026
JEE Main · 21 January 2026, Shift 2 · Q38
The total length of potentiometer wire AB is 50 cm in the arrangement as shown in figure. If P is the point where the galvanometer shows zero reading…
The total length of potentiometer wire AB is $\displaystyle 50$ cm in the arrangement as shown in figure. If $\displaystyle P$ is the point where the galvanometer shows zero reading then the length AP is $\displaystyle \_\_\_\_$ cm.
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle 30$
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.