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Monday, November 18, 2013

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

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

Explanatory answer : B


Flux density = flux / area

So if area increases, flux density decreases.

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