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 Powering a Coil		  New Topic  Reply to Topic
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e3nigma
Apprentece

14 Posts
Posted - Oct 15 2009 :  10:33:51 AM  Show Profile  Reply with Quote
I have a coil that has a resistance of 250 ohms. I want to power it with 12 volts. How do I calculate how many amps are needed to power the coil? Do i use the equation: I=E/R ? Or how do i determine the power ratios needed? Thanks.

E3

audioguru
Nobel Prize Winner

Canada
3931 Posts
Posted - Oct 15 2009 :  2:44:12 PM  Show Profile  Reply with Quote
The coil will draw 12V/250ohms= 48mA. Its operating power is 12V x 48mA= 0.576W.
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Darkthero
Apprentice

USA
51 Posts
Posted - Nov 03 2009 :  06:46:59 AM  Show Profile  Reply with Quote
what type of coil is it. and what for
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