Examlex
A blog needs ____ to create/maintain a blog.
North Magnetic Pole
The point on the Earth's surface where geomagnetic field lines are directed vertically downwards, the opposite of the Geographical North Pole.
Compass Needle
A magnetized pointer free to align itself with Earth's magnetic field, used in compasses for navigation.
Earth
The third planet from the Sun, our home planet, or in electrical terms, the reference point in an electrical circuit for the return path of currents or a direct physical connection to the ground.
Ampere-Turns
A basic unit for measurement of magnetism. The product of number of turns of wire times current flow.
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