Define the magnets, Physics

Assignment Help:

Define the Magnets

Magnets work according to rules similar to electric charges. All magnets have two poles, north (actually north-seeking) and south poles. Like poles repel and unlike poles attract. If you break a magnet in two, you get two magnets, each with a north and south pole. Try it yourself - but not with your brother's favorite magnet.

1218_Magnets 1.png

Modern theories of magnetism explain magnetic materials as  materials in which the magnetic domains in the material are aligned. Magnetic domains are each about an area of about 10 m by 10 m or 1020 atoms or molecules of the material. The more consistently these domains line up, the stronger the magnetic field of the material. This helps us explain why dropping or heating magnets can weaken them. Dropping a magnet can realign its domains. Kinetic theory explains that as a material is heated up, the atoms gain more vibration energy, which can also randomize the alignment of a material's magnetic domains.

Magnetic materials are ones that are attracted to a magnet such as iron, nickel and steel. Some of these materials can be temporarily magnetized by contact with a strong magnet. Nonmagnetic materials are ones not affected by a magnet such as glass, wool, aluminum or brass.

39_Magnets 2.png


Related Discussions:- Define the magnets

Explain term beats, Beats: The periodic vibrations in intensity or loud...

Beats: The periodic vibrations in intensity or loudness of sound because of superposition of two sound waves of similar amplitude and slightly different frequencies are known a

Define wave, A wave is a disturbance which transmits power and momentum fro...

A wave is a disturbance which transmits power and momentum from one place to the other without the transport of matter.

What is block hole?, A blackhole is a region of spacetime from which gravit...

A blackhole is a region of spacetime from which gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently compact mas

Determine concept of galaxy travelling toward earth, An astronomer observes...

An astronomer observes that a molecule in a galaxy travelling toward Earth emits light with a wavelength of 514 nm. The astronomer identifies the molecule as one that actually

Determination of packing fraction of diamond, Determination of packing frac...

Determination of packing fraction of diamond  The co-ordination number of an atom in diamond structure is 4 as can be seen from the unit cell of diamond and is loosely packed.

Define weightlessness, The weight of a body is the force with which it is a...

The weight of a body is the force with which it is attracted in the direction of the centre of earth. When an object is stationary with respect to the planet, its weight equivalent

Calculate the values of delta, A sample of argon of mass 10.4 g occupies ...

A sample of argon of mass 10.4 g occupies 2100 ml at 30 o C . (i) Calculate the work done by the gas when it expands isothermally against a constant external pressure of 3

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd