• # question_answer 40) An arbitrary shaped closed coil is made of a wire of length L and a current I ampere is flowing in it. If the plane of the coil is perpendicular to magnetic filed $\overrightarrow{B}$, the force on the coil is- A) Zero                 B) IBLC) 2IBL                            D) $\frac{1}{2}\,IBL$

$F=BI\,\,({{\ell }_{i}}-{{\ell }_{f}})$ Here ${{\ell }_{i}}-{{\ell }_{f}}\,=\,0$ for loop