Magnetic field due to currentHard
Question
A conducting rod of length l and mass m is moving down a smooth inclined plane of inclination θ with constant velocity v in fig. A current I is flowing in the conductor in a direction perpendicular to paper inwards. A vertically upward magnetic field 
exists in space. Then magnitude of magnetic field 
is
exists in space. Then magnitude of magnetic field isOptions
A.
sinθ
sinθB.tanθ
tanθC.
D.
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