Right hand rules – how many must you know for the MCAT?

[tdod]

I know that you need the rule for F(magnetic)/Velocity(charge)/B-field as well as Induced-current/Magnetic-flux.

Are there other right hand rules necessary for the MCAT? I thought there were, but I've been googling for quite a while now and can't find any...

Thanks!

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[Cmdr_Shepard]

Just two iirc.

Straight fingers for force/current within an existing field.

Curled fingers for current generating a field.