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Referring to the idea of using grass seeds for observing electric field near current carrying wires from the following article, https://www.ifi.unicamp.br/~assis/Found-Phys-V29-p729-753(1999).pdf

grass seeds for electric field

I am wondering how can we visualize both electric field and magnetic field simultaneously using both grass seeds and iron fillings around a current carrying wire. Since they will be perpendicular to each other will it be possible to practically execute this idea?

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