Magnetism

Magnetism is simply an abstraction that people use for the changes in electromagnetic force created by the motion of electric charges. There are different types of magnetism that include electromagnetism, ferromagnetism, paramagnetism, and diamagnetism. To learn more and share your knowledge of magnetism and its types, ask and answer questions here.

9,775 Questions
Magnetism

Is magnetism stronger or is gravity stronger?

dependz on the magnet :P:P

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Calculus
Electrostatics
Magnetism

What is the value of k in electrostatics?

In the formula for electrostatic forces, the value of k is 8.99 x 109 N m2 C-2

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Science
Magnetism
Elements and Compounds

What cannot be magnetized?

Pretty much everything has a magnetic response of some kind and fall into four broad categories:

Ferromagnetic - Like carbon steel, Iron. You apply a magnetic field to it and when you take that field away the material stays magnetized.

Antiferromagnetic - Apply a field and the sample will have a magnetic response that opposes the applied field, the magnetisation remains once the applied field is removed.

Paramagnetic - Apply a magnetic field and the sample will have a magnetic response that aligns with the field but take away the applied field and the sample will not stay magnetised

Diamagnetic - Apply a field and the sample will have a magnetic response that opposes the applied field. Take away the applied field and the sample does not stay magnetised.

So, really, everything has a magnetic response, but if you are asking what can't be permanently magnetised then anything that is paramagnetic or diamagnetic - like wood, plastics, jam, cotton.

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Electronics Engineering
Physics
Magnetism

Do electric field lines radiate outward like spokes on a wheel?

Only from a point charge, or from one with spherical symmetry.

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Physics
Magnetism

Does aluminum foil stick to magnet?

No, aluminum is not a magnetic material.

But you could shape the aluminum foil into a coil, then pass a current through it and then it would be an electromagnet.

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North Pole
Magnetism

Who invented magnetic north and south pole?

The idea that the Earth itself acts as a giant magnet was first proposed in 1600 by the English physician and natural philosopher, William Gilbert. He was also the first to define the North Magnetic Pole as the point where the Earth's magnetic field points vertically downwards. This is the definition used nowadays, though it would be several hundred years before the nature of the Earth's magnetic field was understood properly.

Check out the related links below for more information and my source.

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Magnetism

How do electromagnets work?

If a wire is wrapped around a ferromagnetic material (those which are attracted by a magnet) and a current is flown through the wire, the material behaves like a magnet. This phenomenon is known as electromagnetism. The electromagnet can attract other ferromagnetic material just like any magnet. Usually a soft iron-core is used for good results. By such a phenomenon you get a temporary magnet whose magnetic property can be switched on or of by a switch! You can try this at home by wrapping a wire around an iron-nail and using a battery for current.

Hope this helps:)

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Physics
Earth Sciences
Magnetism

When does the magnetic field in rocks form?

Magnetism is a property of certain materials, usually metals, that have an electric dipole on the molecular scale. A dipole is a significant separation between the positive and negative charges in the molecule. Since electrons and protons have spin, and moving electrical charges generate megnetic fields, the dipole generates a net magnetic field. If enough dipoles are oriented in the same direction the body has a net magnetic field.

The dipoles can align when sitting in a permanent magnetic field for a long period of time, like underground in the earth's magnetic field.

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Jokes and Riddles
Physics
Magnetism

What are the different shapes of magnets?

Horseshoe, Bar, U, Ring, Circle, etc.

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Chemistry
Magnetism

Why is Fes unaffected by a magnet?

FeS is a compound in which iron has lost its properties so it is unaffected by a magnet.

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Magnetism

Why aren't all metal magnetic?

Because the chemical structures of the atoms of different metals are not opposite and different metals have different charges.

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Magnetism

What are magnet names?

Magetism

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Physics
Chemistry
Magnetism

What are the types of magnetic substances?

I'm not sure what you mean, but a substance's magnetism (in chemistry) is usually defined as paramagnetic or diamagetic.

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Science
Physics
Magnetism
Electronics

Where are magnets used in homes?

Many, many places:

in computers

in phones

in speakers

in data storage devices

in electrical motors

in clocks

on fridges

and this is by no means a comprehensive list.

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Units of Measure
Electricity and Magnetism
Magnetism

Magnetic induction unit?

tesla

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Electronics Engineering
Physics
Magnetism

How do you focus magnetic flux?

Just a hypothesis: Cylindrical shape with cone shape combined in special array. Made of electric coils and permanent magnets.

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Science
Physics
Magnetism

When there is a sudden collapse of a magnetic field in or around a solenoid. what happens?

Electric current will be induced in such a way that the flux of the magnetic field will be constant and thereby the induced current will create magnetic field in the same direction. This is what we call Lenz's law(law of conservation of energy).

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Science
Magnetism

How do you make temporary magnets?

There are basically two ways to make temporary magnets. They are

the stroke method and the electrical method.

The Stroke Method:

Take a piece of metal like iron and stroke the magnet across it in a certain

direction I.e. in a straight line. Keep stroking the magnet across the iron piece

in the same direction for a few more times. The piece will be slightly magnetized.

The Electrical Method:

Wrap an iron bar with a coil, a conducting wire of copper, and connect the ends of the wire to the terminals of a battery. Electricity will pass through the bar which will result in the formation of an electromagnet.

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Physics
Magnetism

What is the magnetic declination for Texas?

Dallas is 4 degree 11 minutes east.

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Physics
Space Travel and Exploration
Magnetism

Would a magnetic compass be suitable to be used for space travel . if not what kind of equipment would you suggest?

In a word, no.

A conventional magnetic compass only indicates the *Earth's* magnetic field. The influence of any extraterrestrial magnetic fields falls off according to the inverse-square law, that is, the force is diminished by the square of the distance from the source. What this means is that any fields present from other objects are very small compared to the Earth's own field. You can demonstrate this by influencing a compass with a small bar magnet. Once you leave the vicinity of Earth, the usefulness of a magnetic compass disappears almost immediately.

Of present technology, Inertial Navigation is the most suited for space travel. By using accelerometers and gyroscopes to measure acceleration along each axis, and rotation around each axis, you can keep track of distance and direction traveled.

That's how spacecraft got to the moon, planets and beyond the solar system.

Addition: A sextant will always be a handy navigational tool. If interstellar travel ever becomes a reality a real time pulsar triangulator will be a necessity. Every pulsar has a unique rotational frequency. By triangulating apparent angles between the pulsars a spacecrafts position in space can be known.

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Electricity and Magnetism
Magnetism

What does the term induced magnetism mean?

In the simplest terms, Induced Magnetism is magnetism of an object as a result of an external influence. Typically, the external influence is a magnetic field due to another object.

Though this is a technical term, it has a meaning that is the normal meaning of "induced," as in "caused by." This is to be contrasted with other modifiers, like "permanent magnetism" or "remnant magnetism" or "spontaneous magnetism" which are all still magnetism of an object but with a modifier further describing the magnetic state. (One also hears the term transient magnetism applied to the same phenomenon. To be considered transient, the magnetism must disappear when the external influence disappears, but to be "induced" it just has to appear.)

If one is being more technical, then in scientific circles the term "induced magnetism" usually refers the situation where an object acquires a magnetic field as a result of it being in some external magnetic field even though it is not normally a magnetized material. One see this all the time. If you bring a permanent magnet near a collection of paperclips, then the paperclips all attach to one another and to the permanent magnet. Each paperclip has become, temporarily, a magnet. If the permanent magnet is removed, the paperclips no longer attach to one another. The magnetic properties of the paperclips were "induced" and not a permanent characteristic.

More technicalities can be present with this term, because magnetism in an object can be induced in other ways than the application of a magnetic field. In the absence of such technical considerations, it is safe to assume that the term "induced magnetism" just means a temporary state of magnetization of an object induced by an external magnetic field provided by a permanent magnet or an electromagnet.

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Entertainment & Arts
Magnetism

What does the n and s stand for in magnets?

North

and south

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Magnetism

What type of magnet attracts iron fillings?

all magnets

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Magnetism

Why don't all metals attract to magnet?

All the metals are not attracted by a magnet as it attracts only ferromagnetic materials. example. Iron, Cobalt, Nickel, Gadolinium, Dysprosium.

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Physics
Magnetism

Define intensity of magnetization?

Intensity of magnetisation:-

intensity of magnetisation is the magnetic movement per unit volume

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