I was totally unable to understand that. As simple as it is. Got my physics minor basically getting every single rhr question wrong. Don't know how I managed it

[–] key@lemmy.keychat.org 2 points 9 months ago

I hated the hand thing. Instead I remembered it working like the polarity of the "tan" function since that was easy for me to picture.

[–] iiGxC@slrpnk.net 7 points 9 months ago* (last edited 9 months ago)

a = 1 finger

b = 1 finger

a x b = 1 x 1 = 1 thumb

checks out 🤓

[–] moosetwin@lemmy.dbzer0.com 7 points 9 months ago

electroboom singlehandedly making me remember this

[–] Donjuanme@lemmy.world 3 points 9 months ago (1 children)

Also applicable in a modified way in biology, useful for keying snails

[–] tb_@lemmy.world 3 points 9 months ago

That's kind of rude, then they'll have to get their house repainted

[–] KingThrillgore@lemmy.ml 2 points 9 months ago

There's also the left handed rule and the Unity handed rule

[–] funnystuff97@lemmy.world 1 points 9 months ago

Proctoring a physics 1 exam and seeing students do both these and curling their fingers around (thumb in direction of current, curl fingers around direction of magnetic field) was always very humerous to see.