QUESTION IMAGE
Question
next to each pair of interacting objects, select whether an electric field or a magnetic field exists between them.
pair of interacting objects\telectric field\tmagnetic field
two charged balloons are brought close to each other after being rubbed on a woolen cloth.\t○\t○
a bar magnet is placed near a compass needle, causing the needle to align itself with the magnet.\t○\t○
a positively charged rod is brought close to small pieces of neutral paper, and the paper is attracted to the rod.\t○\t○
two magnets are placed on a table. when one magnet is moved, the other is attracted to it without making contact.\t○\t○
1. Two charged balloons...
Charged objects interact via electric fields. The balloons are charged (after rubbing on woolen cloth), so the interaction is due to an electric field.
Magnets (and magnetic materials like compass needles) interact via magnetic fields. The bar magnet and compass needle interact magnetically.
A charged rod (positive charge here) interacts with neutral paper (polarized by the electric field of the rod) via an electric field. Charged objects create electric fields that act on other charged or polarizable objects.
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Electric field (select the radio button under "Electric field" for this pair)