Physics · 2020
JEE Main · 4 September 2020, Shift 1 · Q13
A wire A, bent in the shape of an arc of a circle, carrying a current of 2 A and having radius 2 cm and another wire B, also bent in the shape of arc…
A wire A, bent in the shape of an arc of a circle, carrying a current of $\displaystyle 2$ A and having radius $\displaystyle 2$ cm and another wire B , also bent in the shape of arc of a circle, carrying a current of $\displaystyle 3$ A and having radius of $\displaystyle 4$ cm, are placed as shown in the figure. The ratio of the magnetic fields due to the wires A and B at the common centre O is :
Official answer
(1)
$\displaystyle 6$ : $\displaystyle 5$
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.