Question

What happens to motional EMF if \[\vec{v}\parallel\vec{B}\]?

Options

• The length of conductor doubles

• The EMF becomes \[Blv\]

• No EMF (no force on charges perpendicular to motion)

• Maximum EMF

Answer 1

When velocity is parallel to the magnetic field, there is no magnetic force on the charges from their motion through that field. Therefore, no motional EMF is produced in this case.