Direction of Force on a Current-Carrying Wire
It's not uncommon to forget the direction of the forces on current carrying wires. The magnetism researchers in PSSC "A Magnet Laboratory" admit they forget sometimes. Professor Bitter gave you a remarkable way to remember this though: he actually did it by passing a ridiculous amount of current through lots of parallel wires, and then through a copper bar bent in a U shape. The parallel currents sucked the wires in, and the U shape blew outwards. Remembering these few minutes is worth it as you approach a magnetism test.
Here's the link to the movie. Watch between 6:41 and 9:56
Direction of Force on a Current-Carrying Wire
It's not uncommon to forget the direction of the forces on current carrying wires. The magnetism researchers in PSSC "A Magnet Laboratory" admit they forget sometimes. Professor Bitter gave you a remarkable way to remember this though: he actually did it by passing a ridiculous amount of current through lots of parallel wires, and then through a copper bar bent in a U shape. The parallel currents sucked the wires in, and the U shape blew outwards. Remembering these few minutes is worth it as you approach a magnetism test.
Here's the link to the movie. Watch between 6:41 and 9:56