We have this same problem with electric and magnetic fields. Depending on your reference ... the negatively charged electron and the positive proton. If an object has more electrons than protons ...

Flow field designs for the bipolar plates of the proton exchange membrane fuel cell are reviewed; including the serpentine, parallel, interdigitated, mesh type or their mixtures, furthermore 2D ...

A simulated magnetar with magnetic field lines and surface temperature (temperature increases with color, tending from red to yellow). Credit: ©Raphaël Raynaud (LMPA/AIM/IRFU/DRF/CEA Saclay) A ...

If you need help visualizing magnetic fields, these slow-motion video captures should educate or captivate you. Flux lines are difficult to describe in words, because magnet shape and strength ...