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Physics · 2015
JEE Main 2015 · 2015-04-04 Offline · Q20
Two long current carrying thin wires, both with current I, are held by insulating threads of length L and are in equilibrium as shown in the figure,…
Two long current carrying thin wires, both with current I, are held by insulating threads of length L and are in equilibrium as shown in the figure, with threads making an angle ' $\displaystyle \theta$ ' with the vertical. If wires have mass $\displaystyle \lambda$ per unit length then the value of I is :
(g =gravitational acceleration)Official answer
(2)
$\displaystyle 2 \sin \theta \sqrt{\frac{\pi \lambda \mathrm{gL}}{\mu_0 \cos \theta}}$
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JEE Main 2015 Physics question, with the answer from NTA’s final answer key. Where our answers come from.