A long, straight, horizontal wire located on the equator carries a current. In what direction should the current if the magnetic force acting on the conductor is vertically down?
With an explanation please.
The magnetic force acting on the current carrying wire is given by
Consider East = X-axis (unit vector ); North = Y-axis (unit vector ); Up = Z-axis (unit vector )
B is towards North and Force must be down then the direction is along WEST.
since then - = ___ x
we know x = then - x = -
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