Physics · 2022
JEE Main · 24 June 2022, Shift 1 · Q49
The magnetic field at the centre of a circular coil of radius r, due to current I flowing through it, is B. The magnetic field at a point along the…
The magnetic field at the centre of a circular coil of radius r , due to current I flowing through it, is $\displaystyle B$. The magnetic field at a point along the axis at a distance $\displaystyle \frac{r}{2}$ from the centre is :
Official answer
(3)
$\displaystyle \left(\frac{2}{\sqrt{5}}\right)^3 \mathrm{~B}$
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.