Question

A long, straight, horizontal wire located on the equator carries a current. In what direction should...

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?

    (a) upward

    (b) east

    (c) west

    (d) south

With an explanation please.

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Homework Answers

Answer #1

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 = -

OPTION C

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