Physics · 2025
JEE Main · 8 April 2025, Shift 2 · Q39
Figure shows a current carrying square loop ABCD of edge length is ' a ' lying in a plane. If the resistance of the ABC part is r and that of ADC…
Figure shows a current carrying square loop ABCD of edge length is ' $\displaystyle a$ ' lying in a plane. If the resistance of the ABC part is r and that of ADC part is 2r, then the magnitude of the resultant magnetic field at centre of the square loop is
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle \frac{\sqrt{2} \mu_{\mathrm{o}} \mathrm{I}}{3 \pi a}$
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.