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Anonymous Poster #1

Transformer

05/06/2012 12:50 PM

Hi! Consider a current current carrying coil has a source of dc electrical energy. Let another coil which is not the current carrying placed very closer to the current carrying coil..... If both the coils are stationary, IS THERE ANY CHANCE OF INDUCTION OF EMF IN NON CURRENT CARRYING COIL.... i have this doubt because the transformer works only on the basis of AC current & in the above case, mag field is also not changing.... Therefore the faraday's first law is also not aplicable...... Then i dont thik that there is any chance of induction of emf in another coil........ PLEASE CLEAR THE DOUBT....
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lyn
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#1

Re: Transformer

05/06/2012 12:52 PM

Yes.
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user-deleted-1070
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#2
In reply to #1

Re: Transformer

05/06/2012 1:17 PM

Sorry sir! I cnt undrstand...... Can u plz explain in brief.....

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lyn
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#4
In reply to #2

Re: Transformer

05/06/2012 2:57 PM

Before we can proceed, you will have to define what you mean. It is either carrying "current", or it isn't.

Consult your textbook for the definition of "electrical current".
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user-deleted-1070
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#3
In reply to #1

Re: Transformer

05/06/2012 1:19 PM

Sorry sir! I cnt undrstand...... Can u plz explain in brief.....

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jack of all trades
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#5

Re: Transformer

05/06/2012 3:13 PM

Have a think about this, current cannot flow in an open circuit, and transformers only work with an alternating current.

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Tornado
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#6

Re: Transformer

05/06/2012 3:53 PM

Is the second coil also carrying DC, or is it AC?

If DC, no induction in the first coil; if AC, then there will be induction.

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shan balakrishnan s
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#7

Re: Transformer

05/07/2012 2:54 AM

hello,

its simple.in the second coil in steady state no emf will be induced.but during switchin on and off of dc and during disturbances in dc emf will be induced in secondary coil,whether it carries any current or not.in relays this magnitude has to be calculated during its design.

thanks
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mathewkyle
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#8

Re: Transformer

05/07/2012 3:02 AM

If I understand right, there is DC flowing through one coil. A coil with no current is placed near the first coil.
An emf will be generated in the second coil as the Dc current is first turned on (if the second coils was already nearby), or when the second coil is brought near the first (if the first was already carrying Dc current).
Same as shan balakrishnan s!

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jack of all trades (1); lyn (2); mathewkyle (1); shan balakrishnan s (1); Tornado (1); user-deleted-1070 (2)

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