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Overunity Machines Forum



MH's ideal coil and voltage question

Started by tinman, May 08, 2016, 04:42:41 AM

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0 Members and 26 Guests are viewing this topic.

Can a voltage exist across an ideal inductor that has a steady DC current flowing through it

yes it can
5 (25%)
no it cannot
11 (55%)
I have no idea
4 (20%)

Total Members Voted: 20

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poynt99

#295
May 13, 2016, 10:40:35 PM
Quote from: tinman on May 13, 2016, 10:36:26 PM
I have made the question very simple MH--see diagram below.


Brad

Is this loop current steady, or is it continuously-varying with time?
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picowatt

#296
May 13, 2016, 10:45:21 PM
Quote from: tinman on May 13, 2016, 10:36:26 PM
I have made the question very simple MH--see diagram below.


Brad

When the supply is first connected or turned on (T=0) the voltage measured across the inductor will essentially be whatever the V supply voltage is.

It is still an inductor with reactance, and it will take time for the current flow to build.

PW

tinman

#297
May 13, 2016, 10:48:24 PM
Quote from: picowatt on May 13, 2016, 10:45:21 PM
When the supply is first connected or turned on (T=0) the voltage measured across the inductor will essentially be whatever the V supply voltage is.

It is still an inductor with reactance, and it will take time for the current flow to build.

PW

You have not answered the question asked in the diagram below.


Brad

picowatt

#298
May 13, 2016, 10:53:08 PM
Quote from: tinman on May 13, 2016, 10:48:24 PM
You have not answered the question asked in the diagram below.


Brad

I believe I did answer the question.

However, if you are referring to DC conditions, the answer would be no.  But under time varying conditions, as in when you first connect the supply, the answer is yes.

As this relates to MH's original question, at T=0 there is a measurable voltage across the inductor.

PW

picowatt

#299
May 13, 2016, 11:00:30 PM
Tinman,

I did not notice the short circuit you drew into your diagram.  I mistook those arrows for measurement points (only glanced, time is short right now).

Surely you do not believe that is the equivalent circuit for an ideal inductor with zero resistance.

PW


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