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Physics · 2020

JEE Main · 3 September 2020, Shift 2 · Q14

A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire. The wire has a diameter of 4 mm…

A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire. The wire has a diameter of $\displaystyle 4$ mm and a total length of $\displaystyle 30$ cm. The magnetic field changes with time at a steady rate $\displaystyle \mathrm{dB} / \mathrm{dt}=0.032 \mathrm{Ts}^{-1}$. The induced current in the loop is close to (Resistivity of the metal wire is $\displaystyle 1.23 \times 10^{-8} \Omega \mathrm{~m}$ )
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.