this post was submitted on 02 Sep 2024
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A graphic illustration of a right hand gently grasping a large arrow pointed diagonally upward. The thumb is up pointing in the same direction as the arrow. A smaller arrow underneath the hand indicates the direction to wrap the fingers around the large arrow. The title of the image is File:Right hand rule simple.png

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[–] [email protected] 5 points 3 months ago (1 children)

I once used my left hand for the right hand rule because i was writing with my right hand during a physics test

Needless to say, i got the wrong sign

[–] [email protected] 3 points 3 months ago

You may use the left hand, if you use the technical direction of current from '+' to '-'.

[–] [email protected] 3 points 3 months ago (1 children)

me when I'm trying to remember the rotation of magnetic waves created by a current in a wire

[–] [email protected] 2 points 3 months ago (1 children)

Last time I checked a moving charge created a magnetic field, not a wave. And you determine the curl, not the rotation. You didn't remember

[–] [email protected] 5 points 3 months ago

me when I'm trying not to let some nerd get under my skin because I struggled greatly with electromagnetics

[–] [email protected] 2 points 3 months ago

I have to admit that title is really clever

[–] [email protected] 2 points 3 months ago (1 children)

It is funny that this gestures are taught as some kind of mnemonics, but then some for some other application another mnemonic with the opposite hand and same gesture is introduced and I don't ever remember which hand was associated with what anymore. So I remember something about hands that doesn't get me anywhere.

[–] [email protected] 1 points 3 months ago (1 children)

I believe 3D graphics uses both to describe different coordinate systems (some are left handed and some are right)

[–] [email protected] 2 points 3 months ago

Don't even get started with y-up vs z-up

[–] [email protected] 1 points 3 months ago

why even use the right hand rule when you can just take a random guess and be right half of the time