Physics · 2023
JEE Main · 31 January 2023, Shift 2 · Q7
A long conducting wire having a current I flowing through it, is bent into a circular coil of N turns. Then it is bent into a circular coil of n…
A long conducting wire having a current I flowing through it, is bent into a circular coil of N turns. Then it is bent into a circular coil of n turns. The magnetic field is calculated at the centre of coils in both the cases. The ratio of the magnetic field in first case to that of second case is :
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle N^2: n^2$
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JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.