Electromagnetic field

An electromagnetic field was a type of field that was generated by electric devices, such as a holoprojector. B1 battle droids were able to pick up the fields, as one B1 showcased during the Onderonian Civil War. The droid picked up an electromagnetic field, which was being generated from an imagecaster, and another droid pointed out where it was coming from. This battle droid walked to investigate the bag, with his two fellow units packing away in cowardice, but a message from Onderon's former king, Ramsis Dendup, soon began to play. Dendup urged the Onderonian people to fight back against the Confederacy of Independent Systems, and the civilians quickly did as he requested, with the three battle droids being destroyed soon after the message concluded.