“Write down the Lorentz force law.”
This SWBQ is a useful activity for helping students recall what the force is experienced by a charged particle subject to an electric and magnetic field, or
$$\vec{F}=q\left(\vec{E}+\vec{v} \times \vec{B}\right) \; \; .$$
This SWBQ can be incorporated before or after any activity where students must calculate the force exerted on a loop of current in a magnetic field.