A rigid uniform conducting rod of mass m=50 g carrying current I =
5 A is in homogeneous magnetic field B=0.1 T perpendicular to the
current (as drawing shows). One of the ends of this rod is fixed and can
pivot around horizontal axis, second end is free. At what value of the
length of the conducting rod angle of its inclination will equal to θ=45 o ?
(g=10m/s 2 )
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