Question

A narrow vertical rectangular coil is suspended from the middle of its upper side with its plane parallel to a uniform horizontal magnetic field of $0.02 \mathrm{~T}$. The coil has 10 turns and the lengths of its vertical and horizontal sides are $0.1\,m$ and $0.05\,m$ respectively. Calculate the torque on the coil when a current of $5 \mathrm{~A}$ is passed into it. What would be the new value of the torque if the plane of the vertical coil was initially at $60^{\circ}$ to the magnetic field and a current of $5 \mathrm{~A}$ was passed into the coil.

Accepted Answer

$5 	imes 10^{-3}\,\mathrm{Nm}\,\,\&\,\,2.5 	imes 10^{-3}\,\mathrm{Nm}$

Answer

$3 	imes 10^{-3}\,\mathrm{Nm}\,\,\&\,\,3.5 	imes 10^{-3}\,\mathrm{Nm}$

Answer

$4 	imes 10^{-3}\,\mathrm{Nm}\,\,\&\,\,4.5 	imes 10^{-3}\,\mathrm{Nm}$

Answer

$6 	imes 10^{-3}\,\mathrm{Nm}\,\,\&\,\,6.5 	imes 10^{-3}\,\mathrm{Nm}$

JEE PHYSICS MCQ: MAGNETIC EFFECT OF CURRENT

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