A wire carrying a large current "I" from east to west is placed over an ordinary magnetic compass. The end of the compass needle marked "N" will point:
Correct answer: B. South
- A. North
- B. South
- C. East
- D. West
Explanation
The current is in the direction from east to west so current is in that direction, placing your thumb in this direction and then curling your fingers will point in the direction of magnetic field where x=inward lines and (.)= outward lines. The end opposite if the point marked N will obviously point towards the south.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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