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#130643 - 09/18/06 01:46 AM how the polarity of inductor changes?  
satishkumar  Offline
Junior Member
Joined: Sep 2006
Posts: 5
hyd,ap,india
when we apply the D.C source to inductor,current will rise in inductor. but when we switch off the supply how inductor will change its polarity?


satish

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#130644 - 09/21/06 08:24 PM Re: how the polarity of inductor changes?  
John Crighton  Offline
Member
Joined: May 2005
Posts: 177
Southern California
The current in the inductor doesn't change polarity, but the voltage across it does. The voltage is proportional to the change in the magnetic flux, so a decreasing flux has the opposite sign (polarity) from an increasing flux.

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