MAGNETIC POLES The magnetic force surrounding a magnet is not uniform. There exists a great concentration of force at each end of the magnet and a very weak force at the center. Proof of this fact can be obtained by dipping a magnet into iron filings (fig. 1-8). It is found that many filings will [...]
Why compass can be inaccurate Compasses are brilliantly useful but they can sometimes lead us astray, because of two quite different problems called declination (or variation) and deviation. Here's why. compass Declination (variation) Earth spins about an axis (a kind of invisible rod) running through the north pole (sometimes called the geographic north [...]
Compasses - When Bob Dylan sang "like a rolling stone... with no direction home," he obviously wasn't carrying his compass. Armed with a simple bit of magnetized metal, you can almost always find your "direction home" in an instant. People have been navigating with magnetic compasses for the best part of 900 years, so there [...]
How do compasses work? Artwork: Earth behaves as though it has a giant bar magnet built inside it. But the magnet is the opposite way around to how you might think, with its south pole up near Earth's actual (geographic) north pole and vice-versa. A compass needle points north because the north pole of the [...]
Magnetic Field on Earth Earth has a magnetic field. If you imagine a gigantic bar magnet inside of Earth, you'll have a pretty good idea what Earth's magnetic field is shaped like. Of course, Earth DOESN'T have a giant bar magnet inside it; instead, our planet's magnetic field is made by swirling motions of molten [...]
North Magnetic Pole - "Magnetic North" redirects here. For other uses, see Magnetic North (disambiguation). The North Magnetic Pole is the wandering point on the surface of Earth's Northern Hemisphere at which the planet's magnetic field points vertically downwards (in other words, if a magnetic compass needle is allowed to rotate about a horizontal axis, [...]
Polar Reversals: South-Pole Pointing Compass Imagine your compass pointing south instead of north. Compass If you were alive to see it 800,000 years ago, it would have been the Magnetic South Pole. It takes 200,000 to 300,000 years for Earth’s magnetic field to flip polarity. Flipping polarity means the lines of attraction that enter the [...]
What is the Magnetic North Pole? The Earth is one big magnet. The Magnetic North Pole (also known as the North Dip Pole) is a point on Ellesmere Island in Northern Canada where the northern lines of attraction enter the Earth. A compass needle rests freely in its casing so it can maneuver itself. When [...]
What is the Geographic (True) North Pole? The Earth rotates on the geographic north and south poles. The geographic north and south poles are where lines of longitude (meridians) converge in the north. The south and north pole are directly opposite to one another. The North Pole is located in the middle of the Arctic [...]
Magnetic North Shift, Shift In Poles Means Magnetic North Now East Of Grid North For First Time In 220 Years Magnetic north has moved from west of Grid North to the east for the first time in 200 years, causing a massive reworking of the Ordnance Survey's maps. While it's usually thought to be an [...]
Magma Ocean Could Have Given Early Earth Magnetic Field Earth may have possessed a magnetic field shortly after its birth, suggesting that magnetic shielding could have played a larger role in the development of life on Earth than currently thought, researchers say in a new study. Nowadays, churning that occurs in Earth's liquid outer core [...]
What are magnetic fields? Simply speaking a magnetic field is the region around a magnet. Magnets are made out of mineral called magnetide (or lodestone) which has the property of attracting iron. Scientists use magnetic field lines to represent these magnetic fields. The magnetic field lines of a simple magnet are shown in the picture [...]
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