From the image above what can you say about the direction of the magnetic field of the earth. The answer has been started for you; complete it in terms of geographical north and south poles.
The magnetic lines of force of the earth emerge ……………………………………….............The image above shows how iron fillings arrange themselves around a magnet. Based on the arrangement and density of the iron fillings which portion(s) of the magnet have the maximum strength?
a) center of the magnet.
b) North pole.
c) South pole.
d) North and South poles.
Answers
Magnetic lines of force:
The magnetic lines of force of the earth emerge from the south pole and end at the north pole. It shows that the direction of the magnetic field is from north pole to south pole.
The magnetic lines of force are imaginary lines that never cross with each other. The lines are crowded at the poles and lines are spare at the equator. It always in one direction.
The intensity of the magnetic force depends on the number of magnetic lines at that position.
Based on the arrangement and density of the iron fillings which portion(s) of the magnet have the maximum strength b) North pole.
d) North and South poles
Explanation:
The lines of magnetic force flow into a magnet at its north pole and out at its south pole. At the North and South Poles, the force is vertical. At the middle of the magnet, the force is horizontal, and everywhere in between, the magnetic force is at some intermediate angle to the magnet's surface.
Please refer to the attached picture for a diagrammatic representation of the magnetic lines of force.
The magnetic lines of force of the magnet emerge from the South Pole and enter at the North Pole where the concentration of the lines is maximum.
Option D is the answer.
