Page 11 - GALIET PHYSICS BLOSSOMS III

1st Drawing
2nd Drawing
Force Field
Both figures above show the positively charged metal ball on the left side.
The “test charges” brought forward are the objects shown to the right. On the first drawing, the “test charge” is negative; hence, the force field shows attraction based on the law that opposite charges attract (+-, -+). On the second drawing, the “test charge” is positive; hence, the force field shows repellence based on the law that like charges repel (++, --). The black lines represent the electric force fields, which radiate outwards or away from the charge. By contrast, a gravitational field radiates inwards because gravity attracts.
One could measure the electric field by passing an electric wire between the two objects and measure the electron flow through the wire as the objects become closer together or further apart. When electrons move they interact with other currents and with magnetized objects. The current, thus, creates a magnetic field.
Now explain how you would map out the force field around a current-carrying straight wire. In this case you would need to use a very small test coil. Describe what sort of observations you would make to determine the force field and illustrate what results you would find.
Please see attached Exhibit “A,” which shows drawing.
Electromagnetic induction occurs when a circuit with a current flowing through it generates current in another circuit, which is our very small test coil. As I bring the very small test coil close to the wire, the test coil should show increased activity of electron flow. As I pull the very small test coil away from the wire, the electron activity decreases.
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