I am planning to try an connect a homemade electromagnet to an AC adaptor. I have 1 that delivers 9-volts and 300milli-amps and 1 that delivers 6-volts and 2.2 amps. Which one should I use to make the magnet as powerful as possible?
2007-03-29 11:28:47 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Physics
A magnetic field is proportional to the Amp-Turns. So if you use 100 turns of wire and 1 amp that give 100 Amp-Turns and should give about the same field as 1000 Turns of wire and 0.1 Amp However for best results you need to use magnet wire for tighter packing and the thinest wire possible for your maximum current so that you can get the most turns.
2007-03-29 11:33:00 · answer #1 · answered by rscanner 6 · 0⤊ 0⤋
6 volts at 2.2 amps is the higher capacity power transformer. The strength of your magnet will be determined by the amperes times number of turns of the wire, density of the coil and permeability of the core material.
To make the strongest electromagnet, you want to choose the wire thickness such that the total DC resistance of the wire is about 2.7 ohms, so that with 6 volts put to it, you have the full 2.2 amps flowing. You can find websites that tell you the ohms per foot of standard gauges of magnet wire. Wrap the enameled wire tight around an iron core to get the most bang for the buck.
If the DC resistance of the coil is too high, you will not get the strongest magnet possible for your AC adapter. If the resistance is too low, you will burn out the AC adapter by drawing too much current.
2007-03-29 18:39:37 · answer #2 · answered by Adam S 4 · 1⤊ 0⤋
The power should be the product of volt and amps. In this case, your second choice is more powerful. However, considering health hazard for a homemade electronic device, you may want to consider opt for the low-amp device to reduce the risk of electric shock.
2007-03-29 18:35:41 · answer #3 · answered by Anonymous · 0⤊ 0⤋
If the magnet is over 20 ohms, the 9v supply will give you the most current. If it's under 20ohms the 6v supply will work best. Make sure it's at least 3 ohms. that 6 volt supply is enough to heat a small object up pretty good.
2007-03-29 20:36:12 · answer #4 · answered by Nomadd 7 · 0⤊ 0⤋
Amps are what cause magnetism. Go with the amps.
2007-03-29 18:32:06 · answer #5 · answered by Biznachos 4 · 0⤊ 0⤋
amps. the more current that travels through a coiled wire, the greater the magnetic force created.
2007-03-29 18:31:17 · answer #6 · answered by . 1 · 0⤊ 0⤋
volts
2007-03-29 18:39:26 · answer #7 · answered by Anonymous · 0⤊ 0⤋
its all about the amps
2007-03-29 18:36:33 · answer #8 · answered by PB_Smith 1 · 0⤊ 0⤋
6voltsand 2,2amps
2007-03-29 18:33:10 · answer #9 · answered by valbona minga 1 · 0⤊ 0⤋