At a site where the Earth's magnetic field has a magnitude of 0.43 gauss (where 1 gauss = 1.00 X 10'4 T) and points to the north, 68 below the horizontal, a highvoltage power line 182 m in length carries a current of 120 A. Determine the magnitude and direction of the magnetic force exerted on this wire, if the orientation of the wire and hence the current is as follows. (a) horizontally toward the south m.g...... E N direction at :] measured below the horizontal (b) horizontally toward the west magnitude E N direction at :] measured below the horizontal