Electrical Engineering - Magnetism and Electromagnetism - Discussion

Discussion :: Magnetism and Electromagnetism - General Questions (Q.No.3)


For a given wirewound core, an increase in current through the coil

[A]. reverses the flux lines
[B]. decreases the flux density
[C]. increases the flux density
[D]. causes no change in flux density

Answer: Option C


No answer description available for this question.

Praveen said: (Sep 23, 2011)  
As current increases means flux increases by formula pi=n*i.

Sunitha said: (Nov 11, 2013)  
As we know that Flux density B = Q/N.

Q - Flux.
N - No. on turns.

As current increases, flux increases then obviously flux density increases because flux is directly proportional to flux density.

Brahma Krishna said: (Feb 14, 2015)  
Because high voltage induced flux is more.

Roshik said: (Mar 4, 2015)  
When the current flowing through more large the flux is also increased and it increase. The flux density.

Venkatesh said: (Dec 13, 2015)  
We know:

1) pi = NI/S.
2) B = pi/A.

From above relations we can say that as I increases pi increases therefore B of coil increases respectively.

Stark said: (May 2, 2016)  
Here the current passing through the conductor is directly proportional to flux density.

Parimal Bera said: (Mar 24, 2017)  
We know that the current directly proportional to flux density (B).

Amardeep said: (Apr 12, 2020)  
We know flux density is directly proportional to current.

When current is high flux density is high.

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