question_answer

Uniform magnetic field 6 is directed vertically upwards and 3 wires of equal length L, carrying equal current l are lying in a horizontal plane such that the first one is along north, second one along north-east and the third one at \[{{60}^{{}^\circ }}\] north of east. Force exerted by magnetic field B on them is

A)  zero on the first   

B)            \[\frac{BIL}{\sqrt{2}}\]on the second

C)  \[\sqrt{3}\frac{BIL}{\sqrt{2}}\]on the third      

D)  BIL on all of them