Question

What component must the conductor's velocity have for motional EMF?

Options

• A component parallel to both \[\vec{B}\] and \[\vec{l}\]

• A component parallel to \[\vec{B}\] only

• A component parallel to \[\vec{l}\] only

• A component perpendicular to both \[\vec{B}\] and \[\vec{l}\]

Answer 1

The velocity must have a component perpendicular to both the magnetic field and the conductor's length. Without that component, the stated motional emf arrangement does not produce an emf.