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JEE MAIN 2025
08-04-2025 S2
Question
Figure shows a current carrying square loop $A B C D$ of edge length is ' a ' lying in a plane. If the resistance of the $A B C$ part is $r$ and that of ADC part is $2 r$, then the magnitude of the resultant magnetic field at centre of the square loop is
Select the correct option:
A
$\frac{\sqrt{2} \mu_0 \mathrm{I}}{3 \pi a}$
B
$\frac{\mu_0 \mathrm{I}}{2 \pi a}$
C
$\frac{2 \mu_{\mathrm{o}} \mathrm{I}}{3 \pi a}$
D
$\frac{3 \pi \mu_0 \mathrm{I}}{\sqrt{2} a}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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