The arrows always start at the magnet's north pole and point towards its south pole. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel).
When opposite poles of the magnets approach, they attract each other. Any north-south combination will pull them together. But when two like poles come together, they push each other apart. Two north poles will not stick together.
Two magnets together will be slightly less than twice as strong as one magnet. When magnets are stuck entirely together (the south pole of one magnet is connected to the north pole of the other magnet) you can add the magnetic fields together.
If you line the magnets up so that two of the same poles face each other, the magnets will push away. This is called repulsion. Opposite poles attract each other, but similar poles repel. The Earth acts like a giant magnet.
By adding one magnet on to the other, e.g. stacking, the stacked magnets will work as one bigger magnet and will exert a greater magnetic performance. As more magnets are stacked together, the strength will increase until the length of the stack is equal to the diameter.
Explanation: When the like pole of two magnets comes close they repel each other because the direction of the line of force is opposite and when the opposite pole comes together they attract each other because the line of force points in the same direction.
The number one best glue to use for attaching magnets to any surface, including other magnets, is two-part epoxy glue. Alternatively, you can use super glue, crazy glue, gorilla glue, silicone glue, liquid nails, and even mod podge in some situations.
A flipped magnetic field could seriously disrupt communications systems and power grids. It could also produce multiple north and south poles, and birds, whales and other migratory animals that use the field to establish a sense of direction could encounter problems.
One simple rule to remember with magnets is that opposites attract. Every magnet has a north pole and a south pole. Placing two unlike poles together causes them to attract. When you try to place two like poles together (north to north or south to south), they will repel each other.
When magnets are close together, with their fields overlapping, the fields combine to produce a resultant field which acts in one direction at any given point. The point X is called a neutral point. The forces due to both magnets cancel each other, i.e. there is no net force, at X.
You can think of a magnet as a bundle of tiny magnets, called magnetic domains, that are jammed together. Each one reinforces the magnetic fields of the others. Each one has a tiny north and south pole. If you cut one in half, the newly cut faces will become the new north or south poles of the smaller pieces.
At a temperature called the Curie point – this varies in different metals, but it is around 770° in iron – permanent magnetism is lost altogether. Over a longer period of time, random temperature fluctuations, stray magnetic fields and mechanical movement will cause magnetic properties to decay.
Magnets are made of a group of metals called ferromagnetic metals. Nickel and iron are examples of these metals. Metals such as these are unique in their ability to be magnetized uniformly. By asking how a magnet works, we mean how the magnetic field of a magnet works on the object.
Te push or pull is the result of a magnetic force. Tis force can act at a distance, meaning the two objects do not have to be in direct contact with one another in order to interact.
The magnetic field around a magnet is the strongest at the poles. The maximum number of magnetic field lines pass through the poles.
A strong magnetic field does no harm to the human body with cautious handling. According to British Pre-Standard No. 50166-1, there is no health risk to the human body in daily cleaning and handling if the magnetic field level is below 3000 Gauss [1].
Permanent magnets can lose their magnetism if they are dropped or banged on enough to bump their domains out of alignment.
A magnet can lose its magnetic property if it is hammered, heated or thrown from a height. Keeping it under water, will not have any impact on its magnetic property.
So how long should my permanent magnet last? Your permanent magnet should lose no more than 1% of its magnetic strength over a period of 100 years provided it is specified and cared for properly. There are a few things that may cause your magnet to lose its strength: HEAT.
Items such as mechanical watches, heart pacemakers, CRT monitors and televisions, credit cards, diskettes and other magnetically stored media such as video tapes are all affected by powerful magnets.
Magnets pull on things made of iron. Now, rub a paper clip with the magnet. Can you pick up other paper clips with it now? The iron in the paper clip can become a magnet too: the paper clip is magnetized by rubbing it with the magnet.
First off, if your "pure gold" is magnetic, then there is iron inside (or maybe nickel). In fact, this is one way to tell if jewelry is actually gold. If it's not attracted to a magnet then there is no iron - but it still might not be gold.
The crust of the Earth has some permanent magnetization, and the Earth's core generates its own magnetic field, sustaining the main part of the field we measure at the surface. So we could say that the Earth is, therefore, a "magnet."
Because there is a reed switch in the laptop base and a corresponding magnet in the laptop lid. This is used to detect when the laptop is closed and so turn the screen off and potentially put the laptop into standby.
Unlike a lot of other items you might bring to space that need additional tools or equipment to function, a magnet will work without any extra help. Magnets don't need gravity or air. Instead, their power comes from the electromagnetic field they generate all by themselves.