Physics · 2019
JEE Main · 8 April 2019, Shift 1 · Q18
A circular coil having N turns and radius r carries a current I. It is held in the XZ plane in a magnetic field B i. The torque on the coil due to…
A circular coil having N turns and radius r carries a current I. It is held in the XZ plane in a magnetic field $\displaystyle \mathrm{B} \hat{i}$. The torque on the coil due to the magnetic field is :
Official answer
(1)
$\displaystyle \mathrm{B} \pi \mathrm{r}^2 \mathrm{I} \mathrm{~N}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.