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

Determine the absolute velocity, Figure shows an arrangement  of a carriage...

Figure shows an arrangement  of a carriage system.  A force P is applied on the carriage B and moving rightward at 3 m/s 2 constant acceleration.  At the instant shown the velocit

Reflection of a pulse at a fixed end, Reflection of a Pulse at a Fixed End ...

Reflection of a Pulse at a Fixed End Let's assume a pulse moving by a medium - perhaps by a rope or a slinky. What happens to the pulse while it reaches the end of that medium?

Flux of the electric field , a) A charge Q is placed at the centre of a cub...

a) A charge Q is placed at the centre of a cube. determine the flux of the electric field through the six surfaces of the cube. b)  Determine the magnitude of the electric field

What is fusion, What is fusion? It is a nuclear reaction in which two n...

What is fusion? It is a nuclear reaction in which two nuclei join to form larger (with nearly combined mass) nuclei. It discharges lot of energy. Sun and stars discharge energy

What are single ends, What are single ends? The extreme fiber optics co...

What are single ends? The extreme fiber optics conductor is farthest from the illuminator. The bit which emits light or the end that lights up.

Factor, Discuss the Factor affecting limiting current.

Discuss the Factor affecting limiting current.

Give any three applications of the superconductors, Q. Give any three appli...

Q. Give any three applications of the superconductors. i) High efficiency ore-separating machines may be built using superconducting magnets which can be used to separate tumou

In the nucleus of 20 ca 40 there are, In the nucleus of 20 Ca 40   there ...

In the nucleus of 20 Ca 40   there are: (1) 40 protons and 20 electrons (2) 20 protons and 40 electrons  (3) 20 protons and 20 neutrons (4) 20 protons and 40 neutrons

Determine the construction of Unijunction Transistors, Construction of UJT ...

Construction of UJT The fundamental structure of a UJT is illustrated in fig. (a). It comprises an n-type silicon bar that is lightly doped. Two end connections are taken fr

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