Question

What is the flux when the magnetic field is perpendicular to the area vector?

Options

• Zero flux: \[\Phi_B=0\]

• Maximum positive flux: \[\Phi_B=BA\]

• Negative flux: \[\Phi_B=-BA\]

• \[\Phi_B=NBA\cos\theta\]

Answer 1

A field perpendicular to the area vector gives \[\theta=90^\circ\]. Since \[\cos 90^\circ=0\], the flux is zero.