- How should two bar magnets be placed together explain?
- Why do 2 magnets repel or attract each other?
- How can a magnet be used to create a free energy device?
- Why does a magnet lose strength each time you drop it?
- How magnet lose their property?
- What causes a magnet to demagnetize?
- Which material is used to make a permanent magnet?
- Which material is not suitable for making a permanent magnet?
How should two bar magnets be placed together explain?
The force is exerted over a distance and includes forces of attraction and repulsion. North and south poles of two magnets attract each other, while two north poles or two south poles repel each other. A magnet can exert force over a distance because the magnet is surrounded by a magnetic field.
Why do 2 magnets repel or attract each other?
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). It’s only when you hold unlike-poles together (a north pointing to a south) that magnets stick together (they are attracted).
How can a magnet be used to create a free energy device?
The simplest generator consists of just a coil of wire and a bar magnet. When you push the magnet through the middle of the coil, an electric current is produced in the wire. The current flows in one direction as the magnet is pushed in, and in the other direction as the magnet is removed.
Why does a magnet lose strength each time you drop it?
Permanent magnets can lose their magnetism if they are dropped or banged on enough to bump their domains out of alignment. The reason that would be hard to bump a piece of iron and make it magnetic is because of the way vibrations propagate in the material.
How magnet lose their property?
If a magnet is exposed to high temperatures, the delicate balance between temperature and magnetic domains is destabilized. At around 80 °C, a magnet will lose its magnetism and it will become demagnetized permanently if exposed to this temperature for a period, or if heated above their Curie temperature.
What causes a magnet to demagnetize?
When a magnetized magnet is exposed to a strong magnetic field that is established in opposition to the magnet’s magnetization, part of the magnet may be demagnetized. Both the external field and the elevated temperature conspire to demagnetize the magnet alloy.
Which material is used to make a permanent magnet?
Permanent magnets are made from special alloys (ferromagnetic materials) such as iron, nickel and cobalt, several alloys of rare-earth metals and minerals such as lodestone.
Which material is not suitable for making a permanent magnet?
Iron is not suitable for making a permanent magnet Materials for making permanent magnets should have high coercivity so that magnetization is not erased by stray magnetic fields, temperature fluctuations or minor mechanical damages. Soft iron/pure iron has much smaller coercivity.