How can i calculate the resistance of this electromagnet?

[radaballer]

I would like to find a ballpark estimate of the resistance caused by an electromagnet such as this: http://www.ebay.com/itm/12V-DC-22-L...296?pt=LH_DefaultDomain_0&hash=item53f0a4f220

 

[berkeman]

I would like to find a ballpark estimate of the resistance caused by an electromagnet such as this: http://www.ebay.com/itm/12V-DC-22-L...296?pt=LH_DefaultDomain_0&hash=item53f0a4f220

It looks like the picture has some light words across it -- KIMKE something. Could that be the manufacturer? Otherwise, can you e-mail the seller and ask if they know, or if they have a datasheet?

 

[radaballer]

It looks like the picture has some light words across it -- KIMKE something. Could that be the manufacturer? Otherwise, can you e-mail the seller and ask if they know, or if they have a datasheet?

The ebay post says the electromagnet uses 5 watts, can i plug that into the equation, 5 watts = 12 volts^2 / Resistance ??

 

[berkeman]

The ebay post says the electromagnet uses 5 watts, can i plug that into the equation, 5 watts = 12 volts^2 / Resistance ??

Yeah, good idea.

 

[scientific601]

Current is listed as 0.42A in the specs. So you could also divide voltage by current (simple ohms law). Same result.