If compass needles are placed on a card board along a circle, with the center at the wire, they will point in:
Correct answer: A. N-S direction
- A. N-S direction
- B. E-W direction
- C. N-E direction
- D. W-S direction
Explanation
The magnetic compass will point in N-S direction.Compass needles point in the N-S direction because the Earth itself is a magnet. The Earth's magnetic field is strongest at the north and south poles, and weakest at the equator. The compass needle is a magnet, and it aligns itself with the Earth's magnetic field. The north pole of the compass needle points towards the south magnetic pole of the Earth, and the south pole of the compass needle points towards the north magnetic pole of the Earth.
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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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