Doesn’t Sonny have the rule for the force on a wire backwards? The force per unit length of wire should be I X B (where I is the current and B is the magnetic field), but he’s computing B X I instead. For the orientation of the current and the field that he’s showing, the force should point down, not up. (Shouldn’t it?) Anyway, maybe he’s on to something. If he’s holding his hand like that, and he sees a girl who’s doing the same, then they’re both trying to figure out the homework assignment, and the force due to the magnetic field between two parallel currents is attractive…
Doesn’t Sonny have the rule for the force on a wire backwards? The force per unit length of wire should be I X B (where I is the current and B is the magnetic field), but he’s computing B X I instead. For the orientation of the current and the field that he’s showing, the force should point down, not up. (Shouldn’t it?) Anyway, maybe he’s on to something. If he’s holding his hand like that, and he sees a girl who’s doing the same, then they’re both trying to figure out the homework assignment, and the force due to the magnetic field between two parallel currents is attractive…