Physics · 2026
JEE Main · 21 January 2026, Shift 1 · Q38
A 1 m long metal rod AB completes the circuit as shown in figure. The area of circuit is perpendicular to the magnetic field of 0.10 T. If the…
A $\displaystyle 1$ m long metal rod AB completes the circuit as shown in figure. The area of circuit is perpendicular to the magnetic field of $\displaystyle 0.10$ T. If the resistance of the total circuit is $\displaystyle 2 \Omega$ then the force needed to move the rod towards right with constant speed $\displaystyle (v)$ of $\displaystyle 1.5$ m/s is $\displaystyle \_\_\_\_$ N.
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle 7.5 \times 10^{-3}$
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.