If the cross-sectional area of a magnetic field decreases, the flux density ________.
A)remains the same
B)decreases
C)increases

Name: If the cross-sectional area of a magnetic field decreases, the flux density ________. A)remains the same B)decreases C)increases
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Question

Quizplus · Accepted Answer

The flux density increases because magnetic flux density is inversely proportional to the cross-sectional area through which the magnetic field lines pass. If the area decreases, the density of these lines (flux density) increases.

If the Cross-Sectional Area of a Magnetic Field Decreases, the Flux