Question

A current is flowing west along a power line. If we neglect the Earth's field, the direction of the magnetic field below...


A current is flowing west along a power line. If we neglect the Earth's field, the direction of the magnetic field below it is? A . East B. north C. South D. West

Answer

The direction of the magnetic field is always perpendicular to the direction of the current. 

When the direction of the current is along the west, the direction of the magnetic field below it is the South direction.

From the right-hand thumb rule, the thumb points in the direction of the current that is in the West direction, the four-finger rotation will give the direction of the magnetic field. The direction of the magnetic field below it is in the South direction.

Thus, the direction of the magnetic field is in the South.

Thus, the correct option is (c).

 

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