Physics · 2022
JEE Main · 25 July 2022, Shift 2 · Q32
The electric current in a circular coil of 2 turns produces a magnetic induction B_1 at its centre. The coil is unwound and is rewound into a…
The electric current in a circular coil of $\displaystyle 2$ turns produces a magnetic induction $\displaystyle B_1$ at its centre. The coil is unwound and is rewound into a circular coil of $\displaystyle 5$ turns and the same current produces a magnetic induction $\displaystyle B_2$ at its centre. The ratio of $\displaystyle \frac{B_2}{B_1}$ is
Official answer
(2)
$\displaystyle \frac{25}{4}$
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.