Page 1 of 1

### Magnets

Posted: Tue Dec 18, 2007 9:30 pm
What is a magnetic field?

### Re: Magnets

Posted: Tue Dec 18, 2007 10:52 pm
Hi pailar,

If you input "magnetic field?" to answers.com , you'll get the definition of magnetic field in several dictionaries, an encyclopedia entry for magnetic field, the wikipedia entry for magnetic field, among others.

Some of these entries are quite technical, and may be too difficult. (you didn't mention what grade you're in.) Some may answer your question. Is your query satisfied?

### Re: Magnets

Posted: Fri Oct 02, 2009 9:55 am
To understand the concept of magnetic fields one should be able to picture it and view it. I think the internet provides lots of information and it can really help understand better what magnetic fields are really about.

### Re: Magnets

Posted: Thu Nov 05, 2009 5:49 pm
A magnet produces a vector field, the magnetic field, at all points in the space around it. It can be defined by measuring the force the field exerts on a moving charged particle, such as an electron. The force (F) is equal to the charge (q) times the speed of the particle times the magnitude of the field (B), or F = q*v x B, where the direction of F is at right angles to both v and B as a result of the cross product. This defines the magnetic field's strength and direction at any point.
A magnetic field can be created with moving charges, such as a current-carrying wire. A magnetic field can also be created by the spin magnetic dipole moment, and by the orbital magnetic dipole moment of an electron within an atom.

### Re: Magnets

Posted: Sun Nov 08, 2009 2:50 pm

a vector (in physics) is something that has both magnitude and direction (meaning it can be put in terms of quantity and has, well, a direction)

magnetic field B is measured in teslas.

For such a simple question, the answer is extremely complicated. If you're interested, here are some of the applications of magnetis (found towards the bottom of the page on the link)

http://www.school-for-champions.com/SCIENCE/magnets.htm

### Re: Magnets

Posted: Tue Mar 06, 2012 7:26 pm