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24 October, 08:02

Idra wraps a wire around a plastic tube and connects the ends of the wires to a device that measures electric current. When she slides a bar magnet through the tube, north pole first, she sees that a small amount of electric current is produced in the wire. She slides three more bar magnets through the tube north pole first, and a small amount of electric current is produced in the wire each time. Predict how the current will change if Idra slides the bar magnets through the tube south pole first.

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  1. 24 October, 08:29
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    bring each tube close to the plastic ball and note any movement of the ball

    Step-by-step explanation:

    Electric fields can exert forces on objects, even if the objects involved are not touching. One way to demonstrate that electric fields exist around charged objects is to observe the effects of their forces at a distance.

    Since the plastic ball of the electroscope is made of insulating plastic and is uncharged, it will be attracted to any charged object brought near it. So Jen can observe the effects of the tube's electric fields by bringing each tube close to the plastic ball and noting any movement of the ball. If the ball moves toward a tube, then the process that Jen used on the tube generated an electric field.
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