A horizontal metal contact in a switching device can move either upwards or downwards. Electrons drift through the contact from right to left while the magnetic field is directed into the page. Which gives the direction of conventional current and the direction of the magnetic force?
Conventional current from right to left; magnetic force upwards
Conventional current from left to right; magnetic force upwards
Conventional current from right to left; magnetic force downwards
Conventional current from left to right; magnetic force downwards