Question

If the magnetic field is parallel to a surface, then magnetic flux at right angle to the surface, is

• A. zero
• B. infinite
• C. small but not zero
• D. large but not infinite

Answer 1

Answer: (A)

zero

Answer 2

The magnetic flux through a surface is given by $\phi=\vec{B}. \vec{A} =BA\, cos \,\theta$ Now since the magnetic field $\vec{B}$ is parallel to the surface, so the magnetic flux in a direction perpendicular to the surface will be $\phi=BA\, cos \,90^{\circ}=0$