Science Buddies: "Ask an Expert"

My question is, What is the effect of electricity on an electromagnet?, I really do not know what to do I was just assinged to do this question so please help

Hi Lwilfredo4.

Read the information on Wikipedia search using keyword:
"electromagnet"

Click on this link:

http://en.wikipedia.org/wiki/Electromagnet


Hope this helps.

reminder: please look up this stuff over the internet before asking us...

aznnerd666

If you haven't done so already, be sure to check out Maxwell's equations. These are the four fundamental equations that define electricity, magnetism, and their relationship.

Maxwell's equations explains it all, but only if you can understand them. Maxwell spent years developing the science that went into them, so you need to go back to what he discovered his first day on the job.

The simple version is that current flowing in a wire produces a magnetic field around the current flow in the wire.

To make this useful, the field needs to be concentrated. This is usually done by putting a lot of wire in a small place by winding it into a coil. If the coil is wrapped around an iron rod, the iron multiplies the effect even more.

If the current varies, the magnetic field strength varies with it. Common applications of this are speakers, earphones, and motors.

Maxwell also discovered that if you vary the magnetic field, you can induce varying currents in the wire. This is how some microhones and generators work.

Robert Reavis