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Magnetism and Electromagnetism - Engineering

Q1:

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

ANS:B - decreases

The formula related to this question is B= flux/area.
as we put it in simple eq.
case 1:
flux= 1
area= 1
B= 1.

case 2:
flux= 1 (remain the same)
area= 2 (increases)
B= 0.5 (decreases).