Physics · 2025
JEE Main · 7 April 2025, Shift 1 · Q39
The percentage increase in magnetic field (B) when space within a current carrying solenoid is filled with magnesium (magnetic susceptibility χ_Mg…
The percentage increase in magnetic field (B) when space within a current carrying solenoid is filled with magnesium (magnetic susceptibility $\displaystyle \chi_{\mathrm{Mg}}=1.2 \times 10^{-5}$ ) is :
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle \frac{6}{5} \times 10^{-3} \%$
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.