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Roughly speaking, what is happening in the interior of the earth probably causes a circulating current, which according to Maxwell's equations, will generate a magnetic field. The magnetic field, by convention, emerges out of a region very near the true north pole and returns to a region very near the true south pole. The magnetic north spot moves with time quite randomly, but if you are away from the arctic circle, the difference between the true North and the magnetic North is not significant. So far, we have desrcibed the existence of the earth's magnetic field (Please see the related link for a apparent shape of the field).
On the other hand, some materials (for example, iron and cobalt) that are ferromagnetic exist (Please see the related link). These materials have basically made of atomic-size magnets inside. When these materials are made into a simple machine (a simple light-weight balance with a pivot at the center) supported on a fulcrum so that the bar can rotate freely, the tiny magnets will try to align themselves with the earth's magnetic field. Another method is to let the rod float on water and it too will align with the earth's magnetic field. What has just described is a compass.
If we know approximately where is the magnetic North and know where we are at the moment, we can move to where we want to go with the aid of a map and a compass. If the "compass" has no marking to indicate North, we can, during the day, use the sun and the time of the day to tell which direction is North on the compass, and during the night, the star map.
Regardless, the combination of a GPS system and gyro is now available to guide you wherever you are (in an urban area surrounding by high rises or inside a vault with no GPS signals), with much higher precision than using a compass.
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What else can I help you with?
How yo find the magnetic field of earth at a particular place?
Using a compass is the easiest way. The needle is going to point to the Magnetic North Pole. That means that the compass needle is ALIGNED with the Magnetic Field Lines of the Earth's magnetic field at your current position.
How is earths magnetic field used by people and animals?
People use Earth's magnetic field for navigation, such as in compasses to find direction. Animals, like birds and fish, can sense Earth's magnetic field to navigate during migration or find their way in the ocean.
Could you use compass in Venus to find way?
Probably not, because Venus has no significant magnetic field.
What are 2 ways of increasing a magnetic field?
One way to increase a magnetic field is by increasing the current flowing through a wire in a coil, known as electromagnetism. Another way is to introduce a magnetic material, such as iron, into the magnetic field, which can enhance and concentrate the field lines.
What helps compasses find our way?
Compasses function based on Earth's magnetic field. The needle inside a compass aligns with the magnetic field, with the north end pointing towards the magnetic north pole. This allows users to find their bearings and determine directions like north, south, east, and west.
Is there a way to eliminate the effect of the earth's magnetic field?
One way to eliminate the effect of the Earth's magnetic field is to use a magnetically shielded room that blocks external magnetic fields. Another approach is to use magnetic field cancelling systems, called Helmholtz coils, to produce a magnetic field that cancels out the Earth's magnetic field in a specific region.
What is a magnetic field vector?
It is a way of representing the magnetic force at a point in the field. The magnitude and direction of the vector represents the strength and the direction of the magnetic force acting on a charged particle in the field.
What is a magnetic compass?
A magnetic compass has a needle mounted in a way that allows it to turn freely. Tis needle always lines up with Earth's magnetic field and points toward magnetic north. The needle is set over a diagram that shows east,south, and west. By knowing which way is north, a sailor can find the other diections. AA magnetic compass has a needle mounted in a way that allows it to turn freely. Tis needle always lines up with Earth's magnetic field and points toward magnetic north. The needle is set over a diagram that shows east,south, and west. By knowing which way is north, a sailor can find the other diections.
What is a compass in science?
In science, a compass is a navigational tool that uses Earth's magnetic field to determine direction. It consists of a magnetized needle that aligns with the magnetic field lines, pointing towards the Earth's magnetic north. This allows users to find their way and navigate accurately.
What Is called when all of lines of force around a magnet?
The configuration of all lines of force around a magnet is called a magnetic field. The magnetic field represents the way in which magnetic forces are distributed in the space surrounding a magnet.
A device that uses the Earth's magnetic field to indicate which way North is?
That is called a magnetic compass.
Is lithium magnetic?
Lithium is not magnetic at room temperature. Its atomic structure and magnetic properties do not align in a way that produces a magnetic field.
