Physics students making finger guns during the E&M exam aren't trying to shoot their way to a better grade—they're using the right-hand rule to figure out magnetic field directions. Point your thumb in the current direction, fingers in the magnetic field direction, and your palm shows you where the force acts. Meanwhile, the non-physics teacher supervising just thinks the classroom has devolved into some weird gang sign competition. Classic electromagnetic confusion in its natural habitat.
Right Hand Rule My Beloved

right-hand-rule-memes, electromagnetism-memes, physics-memes, exams-memes, magnetic-fields-memes | ScienceHumor.io
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