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Physics, 27.01.2020 05:31 newtonthenewt

Aconstruction worker uses an electrical device to attract fallen nails and sharp objects from a construction site. what is causing the attraction of the metal objects?

an electrical wave oscillating perpendicular to the electrical device.
an electrical charge radiating perpendicular to the wire
a magnetic wave radiating perpendicular to an electrical device
a magnetic wave and electrical current moving in opposite directions

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