Physics · 2009
NEET 2009 · Prelims · Code A · Q27
A bar magnet having a magnetic moment of 2 × 10^4 JT^-1 is free to rotate in a horizontal plane. A horizontal magnetic field B =6 × 10^-4 T exists in…
A bar magnet having a magnetic moment of $\displaystyle 2 \times 10^4 \mathrm{JT}^{-1}$ is free to rotate in a horizontal plane. A horizontal magnetic field $\displaystyle \mathrm{B}=6 \times 10^{-4} \mathrm{~T}$ exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction $\displaystyle 60$° from the field is :
Official answer
(4)
$\displaystyle 6$ J
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NEET (UG) 2009 Physics question, with the answer from NTA’s final answer key. Where our answers come from.