Electrical Engineering - Magnetism and Electromagnetism - Discussion

Discussion :: Magnetism and Electromagnetism - General Questions (Q.No.4)

4. 

If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density

[A]. increases
[B]. decreases
[C]. remains the same
[D]. doubles

Answer: Option B

Explanation:

No answer description available for this question.

Ankita Jain said: (Feb 12, 2011)  
If area is increases flux density will be decreases because they are inversely proportional to each other. B=flux/area.

Raja Gopal said: (Nov 23, 2011)  
flux density = flux/area,web/m^2 so flux will decrease

Parmanand K Patel said: (Jun 27, 2012)  
Apart from this, it is well known that density is inversely proportional to area. There fore increase in one will decrease another.

Robert S Mashauri said: (May 23, 2014)  
So here the factor which affect the resistance is take place (the cross-section of wire area) if you decrease the resistance of wire the current is decrease.

Prasad said: (Aug 2, 2014)  
B = flex/area.
But as que flex same.

So B same.
How decrease?

Rani said: (Sep 17, 2014)  
Area of cross section increased. That is inversely proportional to the flux density.

Omprakash Sinha said: (Oct 5, 2015)  
If cross section area is increase then the flux is decrease.

Bharath said: (Jul 27, 2016)  
Flux density and cross sectional area are inversely proportional. How?

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