Physics · 2013
JEE Main · 9 April 2013, Shift 1 · Q13
An electric current is flowing through a circular coil of radius R. The ratio of the magnetic field at the centre of the coil and that at a distance…
An electric current is flowing through a circular coil of radius R. The ratio of the magnetic field at the centre of the coil and that at a distance $\displaystyle 2 \sqrt{2} \mathrm{R}$ from the centre of the coil and on its axis is :
Official answer
(2)
$\displaystyle 27$
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JEE Main 2013 Physics question, with the answer from NTA’s final answer key. Where our answers come from.