Magnetism

Normally you create vacuum by pumping out the air from a sealed container. Electric and magnetic fields would seldom be used, unless you had some electrically charged particles that you wanted to remove from your partial vacuum.

A compass needle points north because it aligns with Earth's magnetic field, specifically the magnetic north pole. Earth's magnetosphere is the region around Earth influenced by the planet's magnetic field, but the compass needle is primarily responding to the magnetic field itself.

Magnets exert a magnetic force on an iron rod, causing the iron to become magnetized and attract or repel other nearby magnetic objects. This force is a result of the alignment of the magnetic domains within the iron, creating a net magnetic field.

You can identify which iron piece is a magnet by bringing a small iron nail close to each piece. The one that attracts the nail is the magnet. Alternatively, you can observe which iron piece attracts small metal objects like paper clips or pins.

Not if the magnet is symmetrical, and you define 'strength' in terms of flux density.
Yes because it has a stronger attraction rate.
there is no stronger or weaker for a magnet

During a magnetic pole reversal, the magnetic orientation of rocks changes to align with the new orientation of the Earth's magnetic field. This means that the magnetization of rocks will also reverse during a geomagnetic field reversal event.

Magnetic production refers to the process of generating or creating magnetic fields using various techniques or materials. This can involve using magnets, electromagnets, or magnetic materials to produce a magnetic field for various applications such as magnetic levitation, data storage, or sensing.

Magnets are actually used in most of the items we use today, such as:

* car doors

* door hinges

* computers

* hoovers

* blenders

* CD players

* washing machines

* fax machines

* escalators

* elevators

* loud speakers

* credit cards

* TVs

* fridge doors

* toys

* jewelry

* electric toothbrushes

* junk yards

* roller coasters

*fridge magnets

usually from ebay or online sites if lucky you can get 150 magnets for 5.00 1000 for30.00 2000 for50.00s there are cheapeer ones (These are good for strss releiif or anger management or just for fun

Demagnetizing. Place the magnet at the opposite end of the metal from where you magnetized it. Again, the magnet must make as much contact with the metal as possible. Rub the metal with the magnet in the opposite direction that you used to magnetize it.

If the magnet and coil are not moving relative to each other, there will be no induced current in the coil. The movement of the magnetic field relative to the coil is required to induce an electromotive force and generate current through electromagnetic induction.

The tangent to a magnetic field line at any point indicates the direction of the magnetic field at that specific location. This is because the tangent line represents the direction a compass needle would point if placed at that point on the field line. The magnetic field lines themselves flow from the north pole of a magnet to its south pole, with the tangent pointing in the direction the magnetic field would act on a north pole.

The charge on north pole is Positive (+ve) and south pole has a Negative (-ve) charge.

Magnetism is a condition of being, not a type of metal, and metals don't typically attract metals. Anything containing iron can become magnetized. All it takes is exposing it to a magnet or applying a DC current to a coil wrapped around it.

The magnetic force weakens with distance, so the magnet may be unable to exert enough force to pick up the paper clip when it is far away. The strength of the magnetic field decreases rapidly with distance, which is why the magnet can only attract objects that are close to it.

The magnet will not be able to directly attract the iron nail because the gold coating acts as a barrier. However, the presence of the iron underneath the gold may still slightly affect the magnetic field.

Like poles (north-north or south-south) do not attract each other because they have the same magnetic orientation. The magnetic field lines around like poles repel each other, leading to a force that pushes them away from each other. This behavior is governed by the fundamental property of magnetism known as the principle of magnetism.

Ferromagnetism only occurs in a few substances; the common ones are iron, nickel, cobalt and their alloys.

Curved lines are used to represent magnetic field lines. The closer together they are, the stronger the magnetic field. Arrows are added to show the direction a north pole would move if placed at that point.

To heat something by induction (which is and oscillating magnetic field), the material has to react to the magnetic field. As the magnetic field is made to oscillate, the molecules of the material are pulled and vibrated in sympathy with the field and their vibration energy increases.

Heat IS the vibration of molecules.

Thus induction heating will work on a magnetic material but will have no effect on a material that is not magnetically susceptible.

Fridge magnets do not consume electricity on their own, so they do not waste electricity. They are simply decorative items that stick to the front surface of the refrigerator using a magnetic force.

When two south magnetic poles are brought near each other, they will repel each other due to their like magnetic charges. This is because opposite magnetic poles attract, while like magnetic poles repel.

Yes, that is correct. Opposite magnetic poles repel each other due to the alignment of the magnetic fields, causing a force that pushes the magnets away from each other.

Materials such as mu-metal or permalloy are commonly used to isolate magnetic fields due to their high magnetic permeability, which allows them to redirect and absorb magnetic flux. These materials can be used to create shielding around sensitive equipment to block out external magnetic fields.